blocks|key|1310192|text|我自己也遇到了这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1310193|我相信如果你重写这个方法：|1310194|-+(void)pressesBegan:(NSSet<UIPress+*>+*)presses+withEvent:(UIPressesEvent+*)event|offset|length|style|CODE|1310195|并且不要在方法中的某个地方调用super：|1310196|[super+pressesBegan:presses+withEvent:event];|1310197|pressedEnded也从未被调用过。|1310198|我遇到过这样一种情况，有时调用pressesEnded，有时不调用，这是我能发现的唯一区别。|1310199|entityMap^0|0|0|0|2A|0|0|0|19|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@$F|W|G|X|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@$F|10|G|11|H|I]]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|13|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|S|$]]

Just ran into this myself.

I believe what is going on is that if you override the method:

<code>- (void)pressesBegan:(NSSet&lt;UIPress *&gt; *)presses withEvent:(UIPressesEvent *)event</code>

And don't call super within the method somewhere:

<code>[super pressesBegan:presses withEvent:event];</code>

pressedEnded is also never called.

I had a situation where sometimes pressesEnded was called and sometimes it wasn't, and that was the only difference I could spot.

blocks|key|2629080|text|它看起来像是pressesEnded没有被及时调用的某种bug。我注意到在pressesEnded和pressesBegan上设置了断点。它总是在pressesBegan上停止，但只在等待一秒钟后才在pressesEnded上停止。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2629081|我能找到的唯一解决方法是在viewDidLoad中添加以下代码|2629082|let+menuPressRecognizer+=+UITapGestureRecognizer()
menuPressRecognizer.addTarget(self,+action:+#selector(ShowListViewController.menuButtonAction))
menuPressRecognizer.allowedPressTypes+=+[NSNumber(value:+UIPressType.menu.rawValue)]
self.view.addGestureRecognizer(menuPressRecognizer)|code-block|syntax|javascript|2629083|然后是这个：|2629084|func+menuButtonAction()+{
++++print("menu+pressed")
++++UIControl().sendAction(#selector(URLSessionTask.suspend),+to:+UIApplication.shared,+for:+nil)
}|2629085|顺便说一句，这是斯威夫特3。|2629086|entityMap^0|6|C|11|C|1E|C|21|C|2S|C|0|D|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|19|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1A|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1B|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|T|$]]

It looks like there's some sort of bug where <code>pressesEnded</code> doesn't get called in time. I noticed by putting a breakpoint on <code>pressesEnded</code> and <code>pressesBegan</code>. It always stops on <code>pressesBegan</code>, but only stops on <code>pressesEnded</code> after waiting a second to continue. 

The only workaround I could find was adding this in <code>viewDidLoad</code>:

<pre><code>let menuPressRecognizer = UITapGestureRecognizer()
menuPressRecognizer.addTarget(self, action: #selector(ShowListViewController.menuButtonAction))
menuPressRecognizer.allowedPressTypes = [NSNumber(value: UIPressType.menu.rawValue)]
self.view.addGestureRecognizer(menuPressRecognizer)
</code></pre>

And then this:

<pre><code>func menuButtonAction() {
 print("menu pressed")
 UIControl().sendAction(#selector(URLSessionTask.suspend), to: UIApplication.shared, for: nil)
}
</code></pre>

That's swift 3 by the way.

blocks|key|1317517|text|我也遇到过这种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1317518|经过一些测试，似乎当“选择”按钮被释放时，tvOS会调用pressesEnded(_+presses:+Set<UIPress>,+with+event:+UIPressesEvent?)+或+pressesCancelled(_+presses:+Set<UIPress>,+with+event:+UIPressesEvent?)。|offset|length|style|CODE|BOLD|1317519|至于为什么会这样，我不知道。在每次按下按钮时，我没有做任何不同的事情。可能是tvOS中的一个bug。|1317520|我跳转到pressesEnded(_+presses:+Set<UIPress>,+with+event:+UIPressesEvent?)的定义，找到了这个解决方案，并找到了这个评论：|1317521|1317522|您的响应者将收到按下each+:withEvent或按下取消:withEvent:按下的每个按键(按下press+:withEvent：)。|blockquote|1317523|1317524|1317525|这是我就同一问题提出的问题的link。|1317526|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/47307963/tvos-pressesended-is-called-intermittently^0|0|S|1U|2P|1Y|2N|1|0|0|4|1U|0|0|0|0|0|E|4|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@$D|14|E|15|F|G]|$D|16|E|17|F|G]|$D|18|E|19|F|H]]|9|@]|A|$]]|$1|I|3|J|5|6|7|1A|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1B|8|@$D|1C|E|1D|F|G]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1I|8|@]|9|@$D|1J|E|1K|1|1L]]|A|$]]|$1|U|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

I have also ran into this situation.

After some testing it seems that when the 'select' button is released tvOS calls either <code>pressesEnded(_ presses: Set&lt;UIPress&gt;, with event: UIPressesEvent?)</code> OR <code>pressesCancelled(_ presses: Set&lt;UIPress&gt;, with event: UIPressesEvent?)</code>. 

As to why this is, I don't know. There isn't anything that I am doing differently between each button press. Could be a bug in tvOS.

I found this solution by jumping to the definition of <code>pressesEnded(_ presses: Set&lt;UIPress&gt;, with event: UIPressesEvent?)</code> and finding this comment:

<blockquote>
 Your responder will receive either pressesEnded:withEvent or
 pressesCancelled:withEvent: for each press it is handling (those
 presses it received in pressesBegan:withEvent:).
</blockquote>

Here is a <a href="https://stackoverflow.com/questions/47307963/tvos-pressesended-is-called-intermittently">link</a> to the question I asked about the same issue.

I am developing a game for tvOS in swift spritekit.
There is a viewcontroller A which presents a SKScene B. I am forwarding the pressesBegan and pressesEnded from A to B.

pressesBegan is being called in A and forwarded to B but pressedEnded is not even called in A. Iam not getting why?

Below are the function implemented in A.

<pre><code>override func pressesEnded(presses: Set&lt;UIPress&gt;, withEvent event: UIPressesEvent?) {
 if ((self.view as! SKView).scene?.isMemberOfClass(GameScene) == true){
 let gameScene = (self.view as! SKView).scene as! GameScene
 gameScene.pressesEnded(presses, withEvent: event)
 }
</code></pre>

}

<pre><code>override func pressesBegan(presses: Set&lt;UIPress&gt;, withEvent event: UIPressesEvent?) {

 if ((self.view as! SKView).scene?.isMemberOfClass(GameScene) == true){
 let gameScene = (self.view as! SKView).scene as! GameScene
 gameScene.pressesBegan(presses, withEvent: event)
 }
}
</code></pre>

pressesEnded in tvOS not being called

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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我正在用swift spritekit为tvOS开发一个游戏。有一个显示SKScene B的viewcontroller A。我正在将pressesBegan和pressesEnded从A转发到B。在A中调用pressesBegan并将其转发到B，但在A中甚至没有调用pressedEnded。我不明白为什么？下面是在A...

问未调用tvOS中的pressesEnded
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