1 /**
2 * 计算上次日期距离现在多久
3 *
4 * @param lastTime 上次日期(需要和格式对应)
5 * @param format1 上次日期格式
6 * @param currentTime 最近日期(需要和格式对应)
7 * @param format2 最近日期格式
8 *
9 * @return xx分钟前、xx小时前、xx天前
10 */
11 + (NSString *)timeIntervalFromLastTime:(NSString *)lastTime
12 lastTimeFormat:(NSString *)format1
13 ToCurrentTime:(NSString *)currentTime
14 currentTimeFormat:(NSString *)format2{
15 //上次时间
16 NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];
17 dateFormatter1.dateFormat = format1;
18 NSDate *lastDate = [dateFormatter1 dateFromString:lastTime];
19 //当前时间
20 NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc]init];
21 dateFormatter2.dateFormat = format2;
22 NSDate *currentDate = [dateFormatter2 dateFromString:currentTime];
23 return [Utilities timeIntervalFromLastTime:lastDate ToCurrentTime:currentDate];
24 }
25
26 + (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime ToCurrentTime:(NSDate *)currentTime{
27 NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
28 //上次时间
29 NSDate *lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];
30 //当前时间
31 NSDate *currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];
32 //时间间隔
33 NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];
34
35 //秒、分、小时、天、月、年
36 NSInteger minutes = intevalTime / 60;
37 NSInteger hours = intevalTime / 60 / 60;
38 NSInteger day = intevalTime / 60 / 60 / 24;
39 NSInteger month = intevalTime / 60 / 60 / 24 / 30;
40 NSInteger yers = intevalTime / 60 / 60 / 24 / 365;
41
42 if (minutes <= 10) {
43 return @"刚刚";
44 }else if (minutes < 60){
45 return [NSString stringWithFormat: @"%ld分钟前",(long)minutes];
46 }else if (hours < 24){
47 return [NSString stringWithFormat: @"%ld小时前",(long)hours];
48 }else if (day < 30){
49 return [NSString stringWithFormat: @"%ld天前",(long)day];
50 }else if (month < 12){
51 NSDateFormatter * df =[[NSDateFormatter alloc]init];
52 df.dateFormat = @"M月d日";
53 NSString * time = [df stringFromDate:lastDate];
54 return time;
55 }else if (yers >= 1){
56 NSDateFormatter * df =[[NSDateFormatter alloc]init];
57 df.dateFormat = @"yyyy年M月d日";
58 NSString * time = [df stringFromDate:lastDate];
59 return time;
60 }
61 return @"";
62 }
63
64 使用如下:
65 NSLog(@"\n\nresult: %@", [Utilities timeIntervalFromLastTime:@"2015年12月8日 15:50"
66 lastTimeFormat:@"yyyy年MM月dd日 HH:mm"
67 ToCurrentTime:@"2015/12/08 16:12"
68 currentTimeFormat:@"yyyy/MM/dd HH:mm"]);
69
70 输出结果如下:
