Objective c 按下UILabel按钮后，UILabel将显示3秒钟

点击暂停按钮后，我希望在用户点击屏幕之前显示一个标签。我该怎么做

到目前为止，我有这个

- (IBAction)ButtonPausePressed:(id)sender {

 PauseLabel.hidden = false (//how do i make it only visible until user taps?//)

if (GameEnd != true){
    if ([GameUpdate isValid]){
        [GameUpdate invalidate];
        [BirdUpdate invalidate];
    }else{
        BirdUpdate = [NSTimer scheduledTimerWithTimeInterval:0.015
                                                      target:self
                                                    selector:@selector(UpdateBird)
                                                    userInfo:nil
                                                     repeats:YES];
        GameUpdate = [NSTimer scheduledTimerWithTimeInterval:0.025
                                                      target:self
                                                    selector:@selector(GameUpdate)
                                                    userInfo:nil
                                                     repeats:YES];
    }
}
}

试着跟随

[your_view addSubview:your_label];
your_label.hidden = YES;
[your_label performSelector:@selector(setHidden:) withObject:@NO afterDelay:3];

试着这样做：

-(void)viewDidLoad
{
        UITapGestureRecognizer *singleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(btnSingleClicked:)];

        [singleTapGesture setDelegate:self];
         singleTapGesture.numberOfTapsRequired = 1;
        [self.view addGestureRecognizer:singleTapGesture];
}

-(void)btnSingleClicked:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateEnded && !self.PauseLabel.hidden)
    {
         [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
         [UIView animateWithDuration:3.0f       // 3 sec to hide it
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseOut
                     animations:^{
                         [self.PauseLabel setAlpha:0.0f];
                                 }
                     completion:^(BOOL finished)
                               {
                                   // remove from super view if needed.
                                   // Now you can handle touch events etc
                                   [[UIApplication sharedApplication] endIgnoringInteractionEvents];
                               }];
    }
}

这条线背后的想法是在viewcontroller的视图上添加一个点击手势，如果显示了暂停标签并且在视图上发生了触摸，请检查其状态是否已结束并用动画隐藏标签。

dispatch\u after（dispatch\u time（dispatch\u time）（int64\t）（3.0*NSEC\u PER\u SEC）），dispatch\u get\u main\u queue（）^{ PauseLabel.hidden=是；

---

});

使用

NSTimer

执行以下操作it@Avt，谢谢，这对我很管用。我甚至不知道您使用的performSelector方法。

-(void)viewDidLoad
{
        UITapGestureRecognizer *singleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(btnSingleClicked:)];

        [singleTapGesture setDelegate:self];
         singleTapGesture.numberOfTapsRequired = 1;
        [self.view addGestureRecognizer:singleTapGesture];
}

-(void)btnSingleClicked:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateEnded && !self.PauseLabel.hidden)
    {
         [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
         [UIView animateWithDuration:3.0f       // 3 sec to hide it
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseOut
                     animations:^{
                         [self.PauseLabel setAlpha:0.0f];
                                 }
                     completion:^(BOOL finished)
                               {
                                   // remove from super view if needed.
                                   // Now you can handle touch events etc
                                   [[UIApplication sharedApplication] endIgnoringInteractionEvents];
                               }];
    }
}