IM聊天會話列表，時間簡單判斷

IM聊天會話列表，時間簡單判斷

//時間顯示內容
-(NSString *)getDateDisplayString:(long long) miliSeconds{
NSLog(@"-時間戳---%lld_----",miliSeconds);

NSTimeInterval tempMilli = miliSeconds;
NSTimeInterval seconds = tempMilli/1000.0;
NSDate *myDate = [NSDate dateWithTimeIntervalSince1970:seconds];

NSCalendar *calendar = [ NSCalendar currentCalendar ];
int unit = NSCalendarUnitDay | NSCalendarUnitMonth |  NSCalendarUnitYear ;
NSDateComponents *nowCmps = [calendar components:unit fromDate:[ NSDate date ]];
NSDateComponents *myCmps = [calendar components:unit fromDate:myDate];

NSDateFormatter *dateFmt = [[NSDateFormatter alloc ] init ];

//2. 指定日曆對象,要去取日期對象的那些部分.
NSDateComponents *comp =  [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:myDate];

if (nowCmps.year != myCmps.year) {
    dateFmt.dateFormat = @"yyyy-MM-dd hh:mm";
} else {
    if (nowCmps.day==myCmps.day) {
        dateFmt.AMSymbol = @"上午";
        dateFmt.PMSymbol = @"下午";
        dateFmt.dateFormat = @"aaa hh:mm";
        
    } else if((nowCmps.day-myCmps.day)==1) {
        dateFmt.dateFormat = @"昨天";
    } else {
        if ((nowCmps.day-myCmps.day) <=7) {
            switch (comp.weekday) {
                case 1:
                    dateFmt.dateFormat = @"星期日";
                    break;
                case 2:
                    dateFmt.dateFormat = @"星期一";
                    break;
                case 3:
                    dateFmt.dateFormat = @"星期二";
                    break;
                case 4:
                    dateFmt.dateFormat = @"星期三";
                    break;
                case 5:
                    dateFmt.dateFormat = @"星期四";
                    break;
                case 6:
                    dateFmt.dateFormat = @"星期五";
                    break;
                case 7:
                    dateFmt.dateFormat = @"星期六";
                    break;
                default:
                    break;
            }
        }else {
            dateFmt.dateFormat = @"MM-dd hh:mm";
        }
    }
}
return [dateFmt stringFromDate:myDate];
}

評論時間戳的處理：

+ (NSString *)mhsq_getDateDisplayString:(long long)seconds {
MHSQ_Log(@"時間戳********%lld********",seconds);

NSDate *myDate = [NSDate dateWithTimeIntervalSince1970:seconds];

NSCalendar *calendar = [NSCalendar currentCalendar];
int unit = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitDay | NSCalendarUnitMonth |  NSCalendarUnitYear;
NSDateComponents *nowCmps = [calendar components:unit fromDate:[ NSDate date ]];
NSDateComponents *myCmps = [calendar components:unit fromDate:myDate];

NSDateFormatter *dateFmt = [[NSDateFormatter alloc ] init ];

//2. 指定日曆對象,要去取日期對象的那些部分.
//    NSDateComponents *comp =  [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:myDate];

// 不是同一年  2018-10-10 15:10
if (nowCmps.year != myCmps.year) {
    dateFmt.dateFormat = @"yyyy-MM-dd hh:mm";
} else {
    if (nowCmps.day == myCmps.day) {            
        /**
         一個小時內，分同一個小時內：如 16：30：00 與 16：20：00，直接拿當前的 分鐘 - 時間戳的分鐘  就是10分鐘前，
         一個小時內，分不同一個小時內：如 16：30：00、15：20：00， 時：(60 - 時間戳 + 當前的分鐘數) / 60   分：(60 - 時間戳 + 當前的分鐘數) % 60
         */
        
        if (nowCmps.hour - myCmps.hour == 0) {
            return [NSString stringWithFormat:@"%ld分鐘前", nowCmps.minute - myCmps.minute];
        } else if (nowCmps.hour - myCmps.hour == 1 && nowCmps.minute + 60 - myCmps.minute < 60) {
            return [NSString stringWithFormat:@"%ld分鐘前", nowCmps.minute + 60 - myCmps.minute];
        } else if (nowCmps.hour - myCmps.hour == 1 && nowCmps.minute + 60 - myCmps.minute >= 60) {
            return [NSString stringWithFormat:@"%ld小時前", nowCmps.hour - myCmps.hour];
        } else if (nowCmps.hour - myCmps.hour > 1) {
            return [NSString stringWithFormat:@"%ld小時前", nowCmps.hour - myCmps.hour];
        }
        
        
    } else if((nowCmps.day - myCmps.day) == 1) {
        // 昨天
        dateFmt.dateFormat = @"昨天 HH:mm";
    } else {

        dateFmt.dateFormat = @"MM-dd HH:mm";
        
    }
}
return [dateFmt stringFromDate:myDate];
}

參考鏈接： https://www.jianshu.com/p/aa92f82c0998