Ios ui按钮随动画显示和消失

我想创建一个按钮，将显示只有5秒，然后消失。用户必须在按钮消失之前单击该按钮。所以我使用animationWithDuration将alpha设置为1，然后将其设置回0。这是我的密码

  __block UIButton *showButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 150, 40)];

[showButton setTitle:@"go to next page！" forState:UIControlStateNormal];
showButton.alpha = 0;
[showButton addTarget:self action:@selector(showButtonClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:showButton];

[UIView animateWithDuration:1
                      delay:0
                    options: UIViewAnimationOptionCurveEaseInOut
                 animations:^{
                     showButton.alpha = 1.0;
                 }
                 completion:nil];

[UIView animateWithDuration:0.5
                      delay:3.0
                    options: UIViewAnimationOptionCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction
                 animations:^{
                     showButton.alpha = 0.0;
                 } 
                 completion:^(BOOL finished){
                     [showButton removeFromSuperview];
                     showButton = nil;
                 }];

-(void)showButtonClick{
  NSLog(@"click")
}

---

但是showButtonClick不能被调用。我做错了什么？

您应该创建一个NSTimer或其他东西来调用动画。因为两个动画同时被调用。这就是为什么您无法单击按钮，因此showButtonClick没有被调用

请尝试以下代码：

UIButton *showButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 150, 40)];

[showButton setTitle:@"go to next page！" forState:UIControlStateNormal];
showButton.alpha = 0;
[showButton addTarget:self action:@selector(showButtonClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:showButton];


[UIView animateWithDuration:1
                      delay:0
                    options: UIViewAnimationOptionCurveEaseInOut
                 animations:^{
                     [showButton setHidden:NO];
                     showButton.alpha = 1.0;
                 }
                 completion: {

                     [UIView animateWithDuration:0.5
                                           delay:0
                                         options: UIViewAnimationOptionCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction
                                      animations:^{
                                       showButton.alpha = 0.0;
                                      } 
                                      completion:^(BOOL finished){
                                       [showButton setHidden:YES];
                     }];
}];



-(void)showButtonClick{
  NSLog(@"click")
}

---

我不明白，为什么您要使用动画两次….因为您的按钮被分配为initWithFrame:CGRectMake（0，0，150，40）…请检查上面的动画代码….它会将按钮从0动画到100动画…动画完成后，按钮将被删除…

您何时点击按钮？在按钮完全可见之后，或者在第一个动画中它是可见的？在按钮完全可见之后。拖延似乎不起作用。是的，你说得对。我在（dispatch_time（dispatch_time_NOW，（int64_t）（每秒5*NSEC_））、dispatch_get_main_queue（）之后添加一个dispatch_；你知道为什么animateWithDuration:delay:optoins:animations:completion:method中的延迟参数仍然会导致动画阻止按钮单击吗？它仍然无法工作。我找到了答案。感谢您的回复：）

[UIView animateWithDuration:5.0
  animations:^{
     initWithFrame:CGRectMake(100, 0, 150, 40)
    //Animation code goes here
  } completion:^(BOOL finished) {
    //Code to run once the animation is completed goes here
     [your button remove from removefromsuperview];
}];