Question

我在https://github.com/DuncanMC/iOS-CAAnimation-group-demo找到了下面列出的代码。该特定方法允许用户在使用手势识别器在核心动画序列中“飞行中”时停止UIView。点击视图时，动画停止。如图所示，此代码仅适用于动画视图。我有很多动画视图，我需要与任何视图进行交互。我想我必须建立一个视图（或层）数组并循环它们。它是否正确？我怎么能这样做？谢谢！

  /*
 This method gets called from a tap gesture recognizer installed on the view myContainerView.
 We get the coordinates of the tap from the gesture recognizer and use it to hit-test
 myContainerView.layer.presentationLayer to see if the user tapped on the moving image view's
(presentation) layer. The presentation layer's properties are updated as the animation runs, so hit-testing
the presentation layer lets you do tap and/or collision tests on the "in flight"   animation.
*/

- (IBAction)testViewTapped:(id)sender
{
  CALayer *tappedLayer;
  id layerDelegate;
  UITapGestureRecognizer *theTapper = (UITapGestureRecognizer *)sender;
  CGPoint touchPoint = [theTapper locationInView: myContainerView];
  if (animationInFlight)
 {
    tappedLayer = [myContainerView.layer.presentationLayer hitTest: touchPoint];
    layerDelegate = [tappedLayer delegate];

    if (((layerDelegate == imageOne && !doingMaskAnimation)) ||
      (layerDelegate == waretoLogoLarge && doingMaskAnimation))
    {
      if (myContainerView.layer.speed == 0)
        [self resumeLayer: myContainerView.layer];
      else
     {
        [self pauseLayer: myContainerView.layer];

    //Also kill all the pending label changes that we set up using performSelector:withObject:afterDelay
    [NSObject cancelPreviousPerformRequestsWithTarget: animationStepLabel];
      }
    }
  }
}

Answer 1

LOL。那个演示项目是我的。编写代码是为了找到被挖掘的图层，然后使用这样一个事实：对于支持UIView的图层，图层的委托就是视图本身。

在代码中找到layerDelegate的位置，你应该确保它是KindOfClass UIView，然后使用任何适合的方法来匹配你的视图和你动画的视图。您可以使用IBOutletCollection来跟踪您正在制作动画的视图，或手动创建可变数组并向其添加视图对象，使用视图标记或对您的应用程序有意义的任何内容。

当所有视图都被动画化时，如何设置手势识别器来交互任何UIView？

1 个答案: