iOS SDK詳解之NSCalendar & NSDate Components

原創 khlljm 2020-06-15 02:25

原文鏈接

前言：NSCalendar 和 NSDate​Components是有關iOS 時間相關API很重要的兩個類。最近剛好用到，這裏就整理下。

概念

  • NSCalendar 顧名思義就是日曆，封裝了系統如何按照年月日的方式來組織時間,組織時間的方式和地區,時區有很大關係
  • NSDate​Components 只是一個容器，容器中詳細包含了年月日時分等信息。
  • NSDate 就是一個絕對的時間，可以換算成相對1970s的時差。

舉例

拆分一個時間 
OC

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">  <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> * date = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> date];<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//當前時間</span>
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> * calendar = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> currentCalendar];<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//當前用戶的calendar</span>
    NSDateComponents * components = [calendar components:NSCalendarUnitMinute | NSCalendarUnitMonth | NSCalendarUnitHour | NSCalendarUnitDay fromDate:date];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%ld月%ld日%ld時%ld分"</span> ,(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span>)components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.month</span>,(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span>)components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.day</span>,(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span>)components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.hour</span>,(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">long</span>)components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.minute</span>);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

Swift

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">   let date = NSDate()
   let calendar = NSCalendar<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.currentCalendar</span>()
   let components = calendar<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.components</span>(NSCalendarUnit<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.CalendarUnitMonth</span> | NSCalendarUnit<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.CalendarUnitDay</span> | NSCalendarUnit<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.CalendarUnitHour</span> | NSCalendarUnit<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.CalendarUnitMinute</span>, fromDate:date)
   NSLog(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%ld月%ld日%ld時%ld分"</span> ,components<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.month</span>, components<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.day</span>, components<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.hour</span>, components<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.minute</span>)</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

相對序號 
例如，查看今天是在今年的第幾周

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">  <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> * calendar = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> currentCalendar];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> * currentDate = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> date];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSInteger</span> week = [calendar ordinalityOfUnit:NSCalendarUnitWeekday inUnit:NSCalendarUnitYear forDate:currentDate];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"今天是今年的第%ld周"</span>,week);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

根據拆分時間返回NSDate 
OC

<code class="hljs vbscript has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> NSDateComponents * components = [[NSDateComponents alloc] init];
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">year</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2015</span>;
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">month</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">7</span>;
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">day</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11</span>;
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">hour</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>;
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">minute</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">30</span>;
    components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">second</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">20</span>;
    NSCalendar * calendar = [NSCalendar currentCalendar];
    NSDate * <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">date</span> = [calendar dateFromComponents:components];

    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat = @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"yyyy年MM月dd日hh時mm分ss秒"</span>;
    NSString * str = [formatter stringFromDate:<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">date</span>];
    NSLog(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%@"</span>,str);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li></ul>

Swift

<code class="hljs vbscript has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> components = NSDateComponents()
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">year</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2015</span>
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">month</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">7</span>
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">day</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11</span>
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">hour</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">minute</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">30</span>
        components.<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">second</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">20</span>
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> calendar = NSCalendar.currentCalendar()
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">date</span> = calendar.dateFromComponents(components)

        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> formatter = NSDateFormatter();
        formatter.dateFormat = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"yyyy年MM月dd日hh時mm分ss秒"</span>;
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> str = formatter.stringFromDate(<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">date</span>!);
        println(str)</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li></ul>

相對時間

現在往後11天10小時 
OC

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> NSDateComponents * components = [[NSDateComponents alloc] init];

    components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.day</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11</span>;
    components<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.hour</span> = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>;
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> * calendar = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> currentCalendar];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> * currentDate = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> date];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> * nextData = [calendar dateByAddingComponents:components toDate:currentDate options:NSCalendarMatchStrictly];
    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];

    formatter<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.dateFormat</span> = @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"yyyy年MM月dd日hh時mm分ss秒"</span>;
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * str = [formatter stringFromDate:nextData];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%@"</span>,str);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li></ul>

Swift

<code class="hljs rust has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> components = NSDateComponents()

components.day = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11</span>;
components.hour = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> calendar = NSCalendar.currentCalendar();
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> currentDate = NSDate()
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> nextDate = calendar.dateByAddingComponents(components, toDate: currentDate, options:NSCalendarOptions.MatchStrictly)


<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span> formatter = NSDateFormatter();

formatter.dateFormat = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"yyyy年MM月dd日hh時mm分ss秒"</span>;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">let</span>  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span> = formatter.stringFromDate(nextDate!)
NSLog(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%@"</span>,<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span>);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li></ul>

這個月有多少天

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> * calendar = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSCalendar</span> currentCalendar];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> * currentDate = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> date];
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSRange</span> range = [calendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:currentDate];</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

其他

創建不同地區的NSCalendar

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-label" style="box-sizing: border-box;">initWithCalendarIdentifier:</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

其中有效的identifer

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSGregorianCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSBuddhistCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSChineseCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSHebrewCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSIslamicCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSIslamicCivilCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSJapaneseCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSRepublicOfChinaCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSPersianCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSIndianCalendar;
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">const</span> NSISO8601Calendar;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li></ul>

一週的開始日期

<code class="hljs  has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">– firstWeekday</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

時區和地區

<code class="hljs  has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">locale
timeZone</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

所有的NSCalendarUnit

<code class="hljs fix has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-attribute" style="box-sizing: border-box;">   NSEraCalendarUnit </span>=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"> kCFCalendarUnitEra,
   NSYearCalendarUnit = kCFCalendarUnitYear,
   NSMonthCalendarUnit = kCFCalendarUnitMonth,
   NSDayCalendarUnit = kCFCalendarUnitDay,
   NSHourCalendarUnit = kCFCalendarUnitHour,
   NSMinuteCalendarUnit = kCFCalendarUnitMinute,
   NSSecondCalendarUnit = kCFCalendarUnitSecond,
   NSWeekCalendarUnit = kCFCalendarUnitWeek,
   NSWeekdayCalendarUnit = kCFCalendarUnitWeekday,
   NSWeekdayOrdinalCalendarUnit = kCFCalendarUnitWeekdayOrdinal,
   NSQuarterCalendarUnit = kCFCalendarUnitQuarter,
   NSWeekOfMonthCalendarUnit = kCFCalendarUnitWeekOfMonth,
   NSWeekOfYearCalendarUnit = kCFCalendarUnitWeekOfYear,
   NSYearForWeekOfYearCalendarUnit = kCFCalendarUnitYearForWeekOfYear 
   NSCalendarCalendarUnit = (1 << 20),
   NSTimeZoneCalendarUnit = (1 << 21),</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li></ul>
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   今天週一,接着做上週沒完成的一個模塊,是根據玩家動作畫指示箭頭, 按照思路做好後,總是出現一些莫名奇妙的找不到資源文件的錯誤, CALL.., 因爲找不到資源,我一致以爲是我在繪圖以及資源調用上出錯了, 一次次的調試,沒發現什麼錯誤

procedure1984 2020-07-07 18:13:01

Delphi中的內存對齊 與 Packed關鍵字

  以delphi爲例：TTest = recordc1: char;i1: Integer;c2: char;c3: Char;end;這個結構如果

procedure1984 2020-07-07 18:13:01

excel中vlookup數據匹配

1）excel 版本爲2016 2）演示實現兩個sheet匹配數據 3）實例中場景是HR通過晉級名單，到員工信息表中，匹配員工基本信息 4)員工基本信息（sheet1） 4)晉級名單（sheet2） 晉級名單中，等級、工號需要

我傲故我狂 2020-07-07 10:05:46

idea工具下使用Java讀取配置文件的方式

博主的application.properties的內容如下： #測試數據庫連接信息 test.db.url=jdbc:mysql://localhost:3306/xxxx test.db.username=xxxx test

TreesYang 2020-07-06 02:59:11

【leetcode】382. Linked List Random Node【M】【74】

Given a singly linked list, return a random node's value from the linked list. Each node must have the same probabili

sscssz 2020-07-05 16:23:50

401. Binary Watch【E】

A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom represent the minu

sscssz 2020-07-05 15:44:42

Java類集框架：Collection ， List ， Set 和 Map 用法和區別

一、常見集合 首先看一下他們之間的關係 Collection          接口的接口   對象的集合 ├ List                   子接口      按進入先後有序保存   可重複 │├ LinkedList 

wusimin432503 2020-07-05 11:49:16

Java類集框架：項目實戰

在這次實例中前端向後端發起查詢實習生信息請求（調用findStudnetEmployeeInfo（）方法），相關流程如下： StudentEmployeeServlet.java頁面    Controller層，向後面發起查詢實習生信

wusimin432503 2020-07-05 11:49:16

mysql中聯合索引排序的問題

背景 在test數據庫中，查詢一組數據會根據id進行排序，而同樣的條件在pre數據庫中查詢卻沒有根據默認的id主鍵來排序，於是激起了好奇心。   情況 正常情況下，在默認沒有寫order by條件的情況下，查詢出來的結果會根據id主鍵從小

zhuxingKevin 2020-07-04 01:46:03

restTemplate遇到的編碼問題

背景：之前用restTemplate做網絡間的請求，沒遇到過問題。今天先是出現了中文亂碼的問題，而後又出現了特殊字符丟失的問題，於是查找資料及翻看源碼，將問題解決也順便記錄下。   問題一：中文亂碼 描述： 在創建課件時，使用GET方法傳

zhuxingKevin 2020-07-04 01:46:03

《架構整潔之道》&《 重構改善既有代碼的設計》 整合

  一、重構定義： 在不改變軟件可觀察行爲的前提下，對軟件內部進行調整(使用重構手法)，以提高其可理解性，降低其修改成本。 -- 重點在兩點： 1. 不改變軟件的可觀察行爲。2. 提高其可理解性。 兩個目的：1. 添加新功能。 2. 重構

为道为僧_何必区分 2020-07-03 22:29:46

spring bean生命週期學習

第一章 IoC容器 IoC定義：Inverse of Control 控制反轉。將new接口實現類的權利交到第三方類（導演類）中。導演類負責實例化接口的實現類，然後注入到依賴類中。 類加載器和反射。通過反射的方式可以將配置文件中定義字符串

为道为僧_何必区分 2020-07-03 22:29:46

iOS時間那點事 NSCalendar NSDateComponents

iOS時間 NSCalendar NSDateComponents  http://my.oschina.net/yongbin45/blog/1

Cola-Bean 2020-07-07 17:32:28