1111

//方式一 后台给的格式为yyyy-MM-dd HH:mm:ss.SSS- (NSString *) compareCurrentTime:(NSString *)str{    //把字符串转为NSdate    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];    NSDate *timeDate = [dateFormatter dateFromString:str];    NSDate *currentDate = [NSDate date];        //得到两个时间差    NSTimeInterval timeInterval = [currentDate timeIntervalSinceDate:timeDate];    long temp = 0;    NSString *result;    if (timeInterval/60 < 1)    {        result = [NSString stringWithFormat:@"刚刚"];    }    else if((temp = timeInterval/60) <60){        result = [NSString stringWithFormat:@"%ld分钟前",temp];    }    else if((temp = temp/60) <24){        result = [NSString stringWithFormat:@"%ld小时前",temp];    }    else if((temp = temp/24) <30){        result = [NSString stringWithFormat:@"%ld天前",temp];    }    else if((temp = temp/30) <12){        result = [NSString stringWithFormat:@"%ld月前",temp];    } else{        temp = temp/12;        result = [NSString stringWithFormat:@"%ld年前",temp];    }    return  result;}

//方式二 后台给的格式为 纯数字1352170595000(13位)- (NSString *)updateTimeForRow:(NSString *)str {    // 获取当前时时间戳 1466386762.345715 十位整数 6位小数    NSTimeInterval currentTime = [[NSDate date] timeIntervalSince1970];    // 创建歌曲时间戳(后台返回的时间 一般是13位数字)    NSTimeInterval createTime =[str floatValue]/1000;    // 时间差    NSTimeInterval time = currentTime - createTime;        //秒转分钟    NSInteger small = time / 60;    if (small == 0) {        return [NSString stringWithFormat:@"刚刚"];    }            if (small < 60) {        return [NSString stringWithFormat:@"%ld分钟前",small];    }        // 秒转小时    NSInteger hours = time/3600;    if (hours<24) {        return [NSString stringWithFormat:@"%ld小时前",hours];    }    //秒转天数    NSInteger days = time/3600/24;    if (days < 30) {        return [NSString stringWithFormat:@"%ld天前",days];    }    //秒转月    NSInteger months = time/3600/24/30;    if (months < 12) {        return [NSString stringWithFormat:@"%ld月前",months];    }    //秒转年    NSInteger years = time/3600/24/30/12;    return [NSString stringWithFormat:@"%ld年前",years];}