iOS 时间戳转换为几分钟前等

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/bitcser/article/details/52240587

该构造方法将时间戳转换为几分钟前/几小时前/几天前/几年前

//createTimeString为后台传过来的13位纯数字时间戳

- (NSString *)updateTimeForRow:(NSString *)createTimeString {

    // 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 = [createTimeString longLongValue]/1000;
    // 时间差
    NSTimeInterval time = currentTime - createTime;
    
    NSInteger sec = time/60;
    if (sec<60) {
        return [NSString stringWithFormat:@"%ld分钟前",sec];
    }
    
    // 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];

}

附录:如果后台给的时间格式为: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.SSS"];
    NSDate *timeDate = [dateFormatter dateFromString:str];

    //得到与当前时间差
    NSTimeInterval  timeInterval = [timeDate timeIntervalSinceNow];
    timeInterval = -timeInterval;
    //标准时间和北京时间差8个小时
    timeInterval = timeInterval - 8*60*60;
    long temp = 0;
    NSString *result;
    if (timeInterval < 60) {
        result = [NSString stringWithFormat:@"刚刚"];
    }
    else if((temp = timeInterval/60) <60){
        result = [NSString stringWithFormat:@"%d分钟前",temp];
    }

    else if((temp = temp/60) <24){
        result = [NSString stringWithFormat:@"%d小时前",temp];
    }

    else if((temp = temp/24) <30){
        result = [NSString stringWithFormat:@"%d天前",temp];
    }

    else if((temp = temp/30) <12){
        result = [NSString stringWithFormat:@"%d月前",temp];
    }
    else{
        temp = temp/12;
        result = [NSString stringWithFormat:@"%d年前",temp];
    }

    return  result;
}