（iOS开发）计算时间差

最新推荐文章于 2021-07-19 14:05:37 发布

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最新推荐文章于 2021-07-19 14:05:37 发布

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分类专栏： iOS开发文章标签： ios ios开发

本文链接：https://blog.youkuaiyun.com/wf990051004/article/details/52596542

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方法1：(限定：IOS8.0之后使用)

//计算时间差
-(int)calculateTime
{
    int timeResult=0;
    NSDateFormatter *date=[[NSDateFormatter alloc] init];
    [date setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *messageTime=[[NSUserDefaults standardUserDefaults] objectForKey:@"lastTime"];
    if (messageTime.length>0) {
        NSDate *messageDate=[date dateFromString:messageTime];
        NSCalendar *cal = [NSCalendar currentCalendar];
        NSString *timeNow=[self getTimeNow];
        NSDate *nowDate=[date dateFromString:timeNow];
        unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
        NSDateComponents *d = [cal components:unitFlags fromDate:messageDate toDate:nowDate options:0];
        timeResult = (int)[d hour]*3600+(int)[d minute]*60+(int)[d second]+(int)[d day]*86400+(int)[d month]*2592000+(int)[d year]*31536000;
        NSLog(@"timeResult: %d",timeResult);
        if (timeResult<0) {
            timeResult=0;
        }
    }
    return timeResult;
}

-(NSString *)getTimeNow
{
    NSDate *GMTDate = [NSDate date];
    NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
    NSInteger interval = [timeZone secondsFromGMT];
    NSDate *localeDate = [GMTDate dateByAddingTimeInterval:interval];
    NSString *time=[NSString stringWithFormat:@"%@",localeDate];
    NSString *timenow=[[NSString alloc]init];
    timenow=[time substringToIndex:19];
    return timenow;
}

方法2：

//后来时间
 NSDate *currentDate = [NSDate date];//获取当前时间，日期

    NSInteger nowtime=[currentDate timeIntervalSince1970];

    //间隔时间

    NSInteger intervalSinceNow =[self distanceTimeWithBeforeTime:begintime withNowDateTime:nowtime];

    

    [submitLog saveLogDatadxID:_releationid timeValue:intervalSinceNow AssetsName:_AssetsName bookID:nil bookName:nil subjectID:_subjectID beginTime:beginDateString];


//初始时间
 NSDate *currentDate = [NSDate date];//获取当前时间，日期

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

    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

    beginDateString = [dateFormatter stringFromDate:currentDate];

    begintime =[currentDate timeIntervalSince1970];

//计算方法
   
- (NSInteger)distanceTimeWithBeforeTime:(NSInteger)beTime withNowDateTime:(NSInteger)nowTime

{

    NSInteger distanceTime = nowTime - beTime;

    return distanceTime;

}