iOS之計算上次日期距離現在多久, 如 xx 小時前、xx 分鐘前等，iosxx

iOS之計算上次日期距離現在多久, 如 xx 小時前、xx 分鐘前等，iosxx
/** *  計算上次日期距離現在多久 * *  @param lastTime    上次日期(需要和格式對應) *  @param format1     上次日期格式 *  @param currentTime 最近日期(需要和格式對應) *  @param format2     最近日期格式 * *  @return xx分鐘前、xx小時前、xx天前 */+ (NSString *)timeIntervalFromLastTime:(NSString *)lastTime                        lastTimeFormat:(NSString *)format1                         ToCurrentTime:(NSString *)currentTime                     currentTimeFormat:(NSString *)format2{    //上次時間    NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];    dateFormatter1.dateFormat = format1;    NSDate *lastDate = [dateFormatter1 dateFromString:lastTime];    //目前時間    NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc]init];    dateFormatter2.dateFormat = format2;    NSDate *currentDate = [dateFormatter2 dateFromString:currentTime];    return [Utilities timeIntervalFromLastTime:lastDate ToCurrentTime:currentDate];} + (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime ToCurrentTime:(NSDate *)currentTime{    NSTimeZone *timeZone = [NSTimeZone systemTimeZone];    //上次時間    NSDate *lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];    //目前時間    NSDate *currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];    //時間間隔    NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];     //秒、分、小時、天、月、年    NSInteger minutes = intevalTime / 60;    NSInteger hours = intevalTime / 60 / 60;    NSInteger day = intevalTime / 60 / 60 / 24;    NSInteger month = intevalTime / 60 / 60 / 24 / 30;    NSInteger yers = intevalTime / 60 / 60 / 24 / 365;     if (minutes <= 10) {        return  @"剛剛";    }else if (minutes < 60){        return [NSString stringWithFormat: @"%ld分鐘前",(long)minutes];    }else if (hours < 24){        return [NSString stringWithFormat: @"%ld小時前",(long)hours];    }else if (day < 30){        return [NSString stringWithFormat: @"%ld天前",(long)day];    }else if (month < 12){        NSDateFormatter * df =[[NSDateFormatter alloc]init];        df.dateFormat = @"M月d日";        NSString * time = [df stringFromDate:lastDate];        return time;    }else if (yers >= 1){        NSDateFormatter * df =[[NSDateFormatter alloc]init];        df.dateFormat = @"yyyy年M月d日";        NSString * time = [df stringFromDate:lastDate];        return time;    }    return @"";} 使用如下:NSLog(@"\n\nresult: %@", [Utilities timeIntervalFromLastTime:@"2015年12月8日 15:50"                                           lastTimeFormat:@"yyyy年MM月dd日 HH:mm"                                            ToCurrentTime:@"2015/12/08 16:12"                                        currentTimeFormat:@"yyyy/MM/dd HH:mm"]); 輸出結果如下: