核心动画，意外的动画位置和hitTest值 [英] Core Animation, unexpected animated position and hitTest values

问题描述

当我使用：

When I use :

CALayer *hitLayer = 
[[self.view.window.layer presentationLayer] hitTest:pointOfTouch]; 

然后我探索图层，发现当前动画的所有属性都设置为最终状态。

I then explore the layer to discover that all the property that are animating at the moment are set to their final states.

我正在测试的图层是iOS 4.3中UIImageView的CALayer。
我还有一个关于UIImage视图的IBOutlet。所以我做了同样的测试：

The layer I'm testing on is the CALayer of an UIImageView in iOS 4.3. I also have an IBOutlet to that UIImage view. So I did the same test like this:

  CALayer *l = [self.topLeft.layer presentationLayer];
  NSLog(@"presentation layer frame for eloise is : %@", [self cgRectDescription:l.frame]);
  NSLog(@"and xPosition = %.2f, yPosition = %.2f & zPosition = %.2f", l.position.x, l.position.y, l.zPosition);

我仍​​然得到相同的结果。

我正在测试（void）touchesBegan：withEvent：当图像移动时。 >
这是我正在使用的动画

And I still get the same result.
I'm testing this in (void)touchesBegan:withEvent: while the image is moving.
Here is the animation I'm using

[UIImageView animateWithDuration:aDuration
                            delay:0
                          options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionBeginFromCurrentState
                       animations:^(void) {
                                  aIv.center = imageStartingPoint;
                                  aIv.layer.zPosition = 0;
                                  imageStartingPoint = CGPointZero;
                                  centerImage = nil;

这可能有点简单，但我不在乎，谢谢，

It's probably a little simple thing, but I'm out of idea, thanks,

推荐答案

我有一个解决方案。

我刚刚探索了一个想法，我意识到我没有检查CABasicAnimation（s）在表示层中表现正确的值...和。 ..他们是。

我必须在显式动画中做那些2，因为不支持隐含。

I just explored an idea, I realize that I didn't check if the value of the CABasicAnimation(s) where behaving correctly in the presentation layer... and... they were.
I had to do those 2 in explicit animation, because implicit was not supported.

所以我做了一些更基本的动画对于图像的中心和zPosition。
现在我在表示层中有信息。

So I made some more basic animation for the center of the image and the zPosition. And now I have the information in the presentation layer.

所以现在我可以得出结论，如果你需要获得一个有效的表示层，你绝对需要使用CAAnimation进行EXPLICIT动画。

So for now I can conclude that if you need to get a valid presentation layer you absolutely need to do EXPLICIT animation with a CAAnimation.

我有点难过，因为我喜欢UIView animateWithDuration：...

I'm kind of sad, because I was liking the UIView animateWithDuration:...

这篇关于核心动画，意外的动画位置和hitTest值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！