返回x分鐘前/x小時前/昨天/x天前/x個月前/x年前
- (NSString *)timeInfo {
return [NSDate timeInfoWithDate:self];
}
+ (NSString *)timeInfoWithDate:(NSDate *)date {
return [self timeInfoWithDateString:[self stringWithDate:date format:[self ymdHmsFormat]]];
}
+ (NSString *)timeInfoWithDateString:(NSString *)dateString {
NSDate *date = [self dateWithString:dateString format:[self ymdHmsFormat]];
NSDate *curDate = [NSDate date];
NSTimeInterval time = -[date timeIntervalSinceDate:curDate];
int month = (int)([curDate month] - [date month]);
int year = (int)([curDate year] - [date year]);
int day = (int)([curDate day] - [date day]);
NSTimeInterval retTime = 1.0;
if (time < 3600) { // 小於一小時
retTime = time / 60;
retTime = retTime <= 0.0 ? 1.0 : retTime;
return [NSString stringWithFormat:@"%.0f分鐘前", retTime];
} else if (time < 3600 * 24) { // 小於一天,也就是今天
retTime = time / 3600;
retTime = retTime <= 0.0 ? 1.0 : retTime;
return [NSString stringWithFormat:@"%.0f小時前", retTime];
} else if (time < 3600 * 24 * 2) {
return @"昨天";
}
// 第一個條件是同年,且相隔時間在一個月內
// 第二個條件是隔年,對於隔年,只能是去年12月與今年1月這種情況
else if ((abs(year) == 0 && abs(month) <= 1)
|| (abs(year) == 1 && [curDate month] == 1 && [date month] == 12)) {
int retDay = 0;
if (year == 0) { // 同年
if (month == 0) { // 同月
retDay = day;
}
}
if (retDay <= 0) {
// 獲取發佈日期中,該月有多少天
int totalDays = (int)[self daysInMonth:date month:[date month]];
// 當前天數 + (發佈日期月中的總天數-發佈日期月中發佈日,即等於距離今天的天數)
retDay = (int)[curDate day] + (totalDays - (int)[date day]);
}
return [NSString stringWithFormat:@"%d天前", (abs)(retDay)];
} else {
if (abs(year) <= 1) {
if (year == 0) { // 同年
return [NSString stringWithFormat:@"%d個月前", abs(month)];
}
// 隔年
int month = (int)[curDate month];
int preMonth = (int)[date month];
if (month == 12 && preMonth == 12) {// 隔年,但同月,就作爲滿一年來計算
return @"1年前";
}
return [NSString stringWithFormat:@"%d個月前", (abs)(12 - preMonth + month)];
}
return [NSString stringWithFormat:@"%d年前", abs(year)];
}
return @"1小時前";
}