在具有填充模式的 CAKeyFrameAnimation 之后无法与 UIButton 交互

Question

我在 IB 中有一个名为 ButtonHolderView 的 UIView。我在此视图中添加了一个 UIButton 并对其进行了动画处理。我设置了委托，以便在按下按钮时通知用户。但是，动画完成后，我无法点击按钮。我可以清楚地看到按钮在设备和视图调试器的视图上。

截图如下：

在设备上：

动画：

按钮向左走，再向右走，再向左走a，再向右走，停！！！

代码：

ViewController.m

属性声明：

  @property (nonatomic,strong) IBOutlet ButtonHolderView *butTopHolder;


-(void)viewDidAppear:(BOOL)animated{
    
    [super viewDidAppear:animated];
   
    _butTopHolder.buttonHolderViewDelegate=self;
    
    [_butTopHolder addButtonViewAnimationWithCompletion:^(BOOL finished) {
       
        NSLog(@"completed");
        
    }];

  }

并且在ButtonHolderView.m中：

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        [self setupHierarchy];
    }
    return self;
}



- (void)setupHierarchy
{
    
    UIView *scaling = [UIView new];
    scaling.clipsToBounds=NO; //tried to set NO
    scaling.bounds = CGRectMake(0, 0, 320, 568);
    scaling.center = CGPointMake(320.0, 568.0);
    scaling.layer.masksToBounds = NO; //tried to set NO
    [self addSubview:scaling];
    
    UIButton *aboutme = [UIButton buttonWithType:UIButtonTypeCustom];
    aboutme.userInteractionEnabled=YES;
    aboutme.bounds = CGRectMake(0, 0, 50.0, 50.0);
    UIImage *imgAboutme = [UIImage imageWithContentsOfFile:[bundle pathForResource:@"aboutme.png" ofType:nil]];
    [aboutme setBackgroundImage:imgAboutme forState:UIControlStateNormal];
    aboutme.contentMode = UIViewContentModeCenter;
    aboutme.layer.position = CGPointMake(80, 80);
    aboutme.alpha = 0.00;
    [aboutme addTarget:self action:@selector(actionAboutmePressed:) forControlEvents:UIControlEventTouchUpInside];
    [scaling addSubview:aboutme];
  }


- (void)addButtonViewAnimationWithCompletion:(void (^)(BOOL finished))completionBlock
{
    [self addButtonViewAnimationWithBeginTime:0 andFillMode:kCAFillModeBoth andRemoveOnCompletion:NO completion:completionBlock];
}



- (void)addButtonViewAnimationWithBeginTime:(CFTimeInterval)beginTime andFillMode:(NSString *)fillMode andRemoveOnCompletion:(BOOL)removedOnCompletion completion:(void (^)(BOOL finished))completionBlock
{
    CAMediaTimingFunction *linearTiming = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    CAKeyframeAnimation *aboutmeTranslationXAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.translation.x"];
aboutmeTranslationXAnimation.duration = 1.150;
aboutmeTranslationXAnimation.values = @[@(0.000), @(-130.000), @(100.000), @(-20.000), @(70.000), @(0.000)];
aboutmeTranslationXAnimation.keyTimes = @[@(0.000), @(0.261), @(0.435), @(0.609), @(0.783), @(1.000)];
aboutmeTranslationXAnimation.timingFunctions = @[linearTiming, linearTiming, linearTiming, linearTiming, linearTiming];
aboutmeTranslationXAnimation.beginTime = beginTime;
aboutmeTranslationXAnimation.fillMode = fillMode;
aboutmeTranslationXAnimation.removedOnCompletion = removedOnCompletion;

}

当使用FillMode:kCAFillModeBoth时，动画后，我能看到设备上的按钮，但不能触摸它

当使用FillMode:kCAFillModeRemoved/Forward/Backward时，动画后，我在设备上看不到按钮，但在视图调试器上可以看到！！！

我尝试将 masksToBounds 设置为 NO，但没有成功。

谁能建议我解决这个问题的方法？

Answer 1

真傻，我不知道如果按钮alpha为0，它就不能接收任何触摸！！！！

最初我将按钮的 alpha 设置为 0 并增加了它的 alpha，一旦动画完成，按钮将它的 alpha 恢复为 0，因此它无法接收任何触摸！！！

在我将 alpha 设置为 1 之后，我可以触摸按钮了！！！

在具有填充模式的 CAKeyFrameAnimation 之后无法与 UIButton 交互

Unable to interact with UIButton after CAKeyFrameAnimation with fill modes

ios

objective-c

uibutton

cakeyframeanimation