动画过程中无法单击iOS按钮 [英] iOS Button not clickable during animation

问题描述

当我使用类别方法向按钮添加动画时，我无法单击该按钮，似乎已被禁用：

When I added animation to my button using a category method, then I can't click that button, seems it is disabled:

[_compassCalibrateButton pulse:1.5 continuously:YES];
_compassCalibrateButton.userInteractionEnabled=YES;

我有一个包含此内容的UIView类别：

I have a UIView category contatining this :

- (void)pulse:(float)secs continuously:(BOOL)continuously {
    [UIView animateWithDuration:secs/2 
                          delay:0.0 
                        options:UIViewAnimationOptionCurveLinear
                     animations:^{
                         // Fade out, but not completely
                         self.alpha = 0.3;
                     }
                     completion:^(BOOL finished) { 
                         [UIView animateWithDuration:secs/2 
                                               delay:0.0 
                                             options:UIViewAnimationOptionCurveLinear
                                          animations:^{
                                              // Fade in
                                              self.alpha = 1.0;
                                          }
                                          completion:^(BOOL finished) { 
                                              if (continuously) {
                                                  [self pulse:secs continuously:continuously];
                                              }
                                          }];
                     }];
}

推荐答案

从文档中

在动画过程中，暂时为
的动画视图禁用用户交互。 （在iOS 5之前，整个应用程序都禁止
进行用户交互。）如果希望用户能够与视图进行
交互，请在选项$ b中包含
UIViewAnimationOptionAllowUserInteraction常量。 $ b参数。

During an animation, user interactions are temporarily disabled for the views being animated. (Prior to iOS 5, user interactions are disabled for the entire application.) If you want users to be able to interact with the views, include the UIViewAnimationOptionAllowUserInteraction constant in the options parameter.

所以您的代码应该是

- (void)pulse:(float)secs continuously:(BOOL)continuously {
    [UIView animateWithDuration:secs/2 
                          delay:0.0 
                        options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
                     animations:^{
                         // Fade out, but not completely
                         self.alpha = 0.3;
                     }
                     completion:^(BOOL finished) { 
                         [UIView animateWithDuration:secs/2 
                                               delay:0.0 
                                             options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
                                          animations:^{
                                              // Fade in
                                              self.alpha = 1.0;
                                          }
                                          completion:^(BOOL finished) { 
                                              if (continuously) {
                                                  [self pulse:secs continuously:continuously];
                                              }
                                          }];
                     }];

}

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