blocks|key|2607015|text|目前还不清楚您想要实现什么，但我认为您应该在imageView中添加手势识别器，而不是向parentView中添加手势识别器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2607016|所以这个：|2607017|parentView.addGestureRecognizer(gr)|code-block|syntax|javascript|2607018|应由以下内容取代：|2607019|imageView.addGestureRecognizer(gr)|2607020|在您的onTap函数中，您可能应该这样做：|2607021|print("ImageView+frame+is+\(gesture.view.layer.visibleRect)")
print("Gesture+occurred+at+\(gesture.location(in:+gesture.view))")|2607022|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

It is not very clear what are you trying to achieve, but i think you should add gesture recognizer to an imageView and not to a parentView. 

So this:

<pre><code>parentView.addGestureRecognizer(gr)
</code></pre>

Should be replaced by this:

<pre><code>imageView.addGestureRecognizer(gr)
</code></pre>

And in your onTap function you probably should do something like this:

<pre><code>print("ImageView frame is \(gesture.view.layer.visibleRect)")
print("Gesture occurred at \(gesture.location(in: gesture.view))")
</code></pre>

blocks|key|1612650|text|我认为您可以检查属于imageView或不属于onTap函数的抽头位置。如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1612651|++++func+ontap(gesture:UITapGestureRecognizer)+{
++++++++let+point+=+gesture.location(in:+parentView)
++++++++if+imageView.layer.frame.contains(point)+{
++++++++++++print("ImageView+frame+is+\(self.imageView.layer.visibleRect)")
++++++++++++print("Gesture+occurred+at+\(point)")
++++++++}
++++}|code-block|syntax|javascript|1612652|entityMap^0|A|9|N|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

I think you can check the tap location that belongs <code>imageView</code> or not on the <code>onTap</code> function.
Like this:

<pre><code> func ontap(gesture:UITapGestureRecognizer) {
 let point = gesture.location(in: parentView)
 if imageView.layer.frame.contains(point) {
 print("ImageView frame is \(self.imageView.layer.visibleRect)")
 print("Gesture occurred at \(point)")
 }
 }
</code></pre>

blocks|key|2193233|text|由于图层不更新它们的帧/位置等，我需要在我编写的图像视图子类(FloatingImageView)中添加以下内容：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2193234|override+func+hitTest(_+point:+CGPoint,+with+event:+UIEvent?)+->+UIView?+{
++++let+pres+=+self.layer.presentation()!
++++let+suppt+=+self.convert(point,+to:+self.superview!)
++++let+prespt+=+self.superview!.layer.convert(suppt,+to:+pres)
++++return+super.hitTest(prespt,+with:+event)
}|code-block|syntax|javascript|2193235|我还将手势识别器移动到父视图，因此在任何时候只有一个GR，并为每个被添加的子视图创建了一个唯一的标记。处理程序如下所示：|2193236|func+onTap(gesture:UITapGestureRecognizer)+{
++++let+p+=+gesture.location(in:+gesture.view)
++++let+v+=+gesture.view?.hitTest(p,+with:+nil)
++++if+let+v+=+v+as?+FloatingImageView+{
++++++++print("The+tapped+view+was+\(v.tag)")
++++}
}|2193237|其中FloatingImageView是UIImageView子类。|2193238|这种方法在iOS+10的一本书(以及WWDC)中进行了描述，并且也适用于iOS+9。我仍然在评估基于UIViewPropertyAnimator的tap检测，所以如果您能给我一个如何使用UIViewPropertyAnimator来完成上述操作的示例，我将把您的答案标记为正确的答案。|2193239|entityMap^0|V|H|0|0|0|0|2|H|K|B|0|1E|M|2L|M|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|T|$]]

As the layers don't update their frame/position etc, I needed to add the following in the image view subclass I wrote (<code>FloatingImageView</code>):

<pre><code>override func hitTest(_ point: CGPoint, with event: UIEvent?) -&gt; UIView? {
 let pres = self.layer.presentation()!
 let suppt = self.convert(point, to: self.superview!)
 let prespt = self.superview!.layer.convert(suppt, to: pres)
 return super.hitTest(prespt, with: event)
}
</code></pre>

I also moved the gesture recognizer to the parent view so there was only one GR at any time, and created a unique tag for each of the subviews being added. The handler looks like the following:

<pre><code>func onTap(gesture:UITapGestureRecognizer) {
 let p = gesture.location(in: gesture.view)
 let v = gesture.view?.hitTest(p, with: nil)
 if let v = v as? FloatingImageView {
 print("The tapped view was \(v.tag)")
 }
}
</code></pre>

where <code>FloatingImageView</code> is the <code>UIImageView</code> subclass. 

This method was described in an iOS 10 book (as well as in WWDC), and works for iOS 9 as well. I am still evaluating <code>UIViewPropertyAnimator</code> based tap detection, so if you can give me an example of how to use <code>UIViewPropertyAnimator</code> to do the above, I will mark your answer as the correct one.

I am using a custom path animation on UIImageView items for a Swift 3 project. The code outline is as follows:

<pre><code>// parentView and other parameters are configured externally
let imageView = UIImageView(image: image)
imageView.isUserInteractionEnabled = true
let gr = UITapGestureRecognizer(target: self, action: #selector(onTap(gesture:)))
parentView.addGestureRecognizer(gr)
parentView.addSubview(imageView)
// Then I set up animation, including:
let animation = CAKeyframeAnimation(keyPath: "position")
// .... eventually ....
imageView.layer.add(animation, forKey: nil)
</code></pre>

The onTap method is declared in a standard way:

<pre><code>func onTap(gesture:UITapGestureRecognizer) {
 print("ImageView frame is \(self.imageView.layer.visibleRect)")
 print("Gesture occurred at \(gesture.location(in: FloatingImageHandler.parentView))")
}
</code></pre>

The problem is that each time I call addGestureRecognizer, the previous gesture recognizer gets overwritten, so any detected tap always points to the LAST added image, and the location is not detected accurately (so if someone tapped anywhere on the parentView, it would still trigger the onTap method).

How can I detect a tap accurately on per-imageView basis? I cannot use UIView.animate or other methods due to a custom path animation requirement, and I also cannot create an overlay transparent UIView to cover the parent view as I need these "floaters" to not swallow the events.

Detecting taps on an animating UIImageView

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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问检测动画UIImageView上的抽头
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