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  • 获取当前的日期和时间-数码

    IOS---如何获取当前的日期和时间,并显示

     
    创建两个UILable: Lable1,Lable2.创建好IBOutlate并连线, 然后用如下方法:

    -(void)updateLabel {

    NSDate* now = [NSDate date];

     NSCalendar *cal = [NSCalendar currentCalendar];


    unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit |NSSecondCalendarUnit;

    NSDateComponents *dd = [cal components:unitFlags fromDate:now];

    int y = [dd year];

    int m = [dd month];

    int d = [dd day];

        

    int hour = [dd hour];

    int min = [dd minute];

    int sec = [dd second];

     

    Lable1.text = [NSString stringWithFormat:@"2d%:2d%:2d%",y,m,d];

    Lable2.text =[NSStrinstringWithFormat:@"2d%:2d%:2d%",hour,min,sec];

    }

     

    - (void)onTimer {

    [viewController updateLabel];

    }

    在AppDeletate.m文件中增加如下方法:

    - (void)applicationDidFinishLaunching:(UIApplication *)application {

    timer = [NSTimer scheduledTimerWithTimeInterval:(1.0) target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

        [window addSubview:viewController.view];

    [window makeKeyAndVisible];

    }

    IOS---如何获取当前的日期和时间,并显示

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  • 原文地址:https://www.cnblogs.com/niexiaobo/p/4615567.html
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