blocks|key|50172|text|Swift|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|50173|CATransaction.begin()
CATransaction.setDisableActions(true)

//+change+layer+properties+that+you+don't+want+to+animate

CATransaction.commit()|code-block|syntax|javascript|50174|entityMap^0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Swift

<pre><code>CATransaction.begin()
CATransaction.setDisableActions(true)

// change layer properties that you don't want to animate

CATransaction.commit()
</code></pre>

blocks|key|2532736|text|您必须通过将代码包装在CATransaction中来显式禁用动画|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2532737|[CATransaction+begin];
[CATransaction+setValue:(id)kCFBooleanTrue
+++++++++++++++++forKey:kCATransactionDisableActions];
layer.content+=+someImageRef;
[CATransaction+commit];|code-block|syntax|javascript|2532738|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You have to explicitly disable animations by wrapping your code in a CATransaction

<pre><code>[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue
 forKey:kCATransactionDisableActions];
layer.content = someImageRef;
[CATransaction commit];
</code></pre>

blocks|key|2532769|text|另一种方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2532770|2532771|您应该禁用sheet.layer的默认动画，它在添加子层时被隐式调用。|ordered-list-item|2532772|您还应该禁用每个子层的内容动画。当然，您可以在每次设置sublayer.content时使用CATransaction的"kCATransactionDisableActions“。但是，您可以在创建子图层时禁用此动画一次。|2532773|2532774|2532775|下面是代码：|2532776|//+disable+animation+of+container
sheet.layer.actions+=+[NSDictionary+dictionaryWithObject:[NSNull+null]+
++++++++++++++++++++++++++++++++++++++++++++++++++forKey:@"sublayers"];

//+disable+animation+of+each+sublayer
sublayer.layer.actions+=+[NSDictionary+dictionaryWithObject:[NSNull+null]+
+++++++++++++++++++++++++++++++++++++++++++++++++++++forKey:@"content"];

//+maybe,+you'll+also+have+to+disable+"onOrderIn"-action+of+each+sublayer.+++++++|code-block|syntax|javascript|2532777|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|V|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|Z|8|@]|9|@]|A|$O|P]]|$1|Q|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|R|$]]

Another way:

<ol>
<li>You should disable default animation of your sheet.layer, which is called implicitly when adding sublayer.</li>
<li>You should also content-animation of each sublayer. Of course, you can use "kCATransactionDisableActions" of CATransaction each time you set sublayer.content. But, you can disable this animation once, when you are creating your sublayer.</li>
</ol>

<hr>

Here is code:

<pre><code>// disable animation of container
sheet.layer.actions = [NSDictionary dictionaryWithObject:[NSNull null] 
 forKey:@"sublayers"];

// disable animation of each sublayer
sublayer.layer.actions = [NSDictionary dictionaryWithObject:[NSNull null] 
 forKey:@"content"];

// maybe, you'll also have to disable "onOrderIn"-action of each sublayer. 
</code></pre>

blocks|key|2532797|text|从MacOSX10.6和iOS+3开始，CATransaction也有一个setDisableActions方法来设置key+kCATransactionDisableActions的值。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2532798|[CATransaction+begin];
[CATransaction+setDisableActions:YES];

layer.content+=+someImageRef;

[CATransaction+commit];|code-block|syntax|javascript|2532799|在Swift中，我喜欢使用这个扩展方法：|2532800|extension+CATransaction+{
++++class+func+withDisabledActions<T>(_+body:+()+throws+->+T)+rethrows+->+T+{
++++++++CATransaction.begin()
++++++++CATransaction.setDisableActions(true)
++++++++defer+{
++++++++++++CATransaction.commit()
++++++++}
++++++++return+try+body()
++++}
}|2532801|然后您可以像这样使用它：|2532802|CATransaction.withDisabledActions+{
++++//+your+stuff+here
}|2532803|entityMap^0|K|D|11|H|1R|S|0|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]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|T|$]]

As of Mac OS X 10.6 and iOS 3, <code>CATransaction</code> also has a <code>setDisableActions</code> method that sets the value for key <code>kCATransactionDisableActions</code>.

<pre><code>[CATransaction begin];
[CATransaction setDisableActions:YES];

layer.content = someImageRef;

[CATransaction commit];
</code></pre>

In Swift, I like to use this extension method:

<pre><code>extension CATransaction {
 class func withDisabledActions&lt;T&gt;(_ body: () throws -&gt; T) rethrows -&gt; T {
 CATransaction.begin()
 CATransaction.setDisableActions(true)
 defer {
 CATransaction.commit()
 }
 return try body()
 }
}
</code></pre>

You can then use it like this:

<pre><code>CATransaction.withDisabledActions {
 // your stuff here
}
</code></pre>

blocks|key|2742757|text|Swift+4扩展:|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2742758|extension+CATransaction+{

++++static+func+disableAnimations(_+completion:+()+->+Void)+{
++++++++CATransaction.begin()
++++++++CATransaction.setDisableActions(true)
++++++++completion()
++++++++CATransaction.commit()
++++}

}|code-block|syntax|javascript|2742759|用法：|2742760|++++CATransaction.disableAnimations+{
++++++++//+things+you+don't+want+to+animate
++++}|2742761|entityMap^0|0|A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Swift 4 extension :

<pre><code>extension CATransaction {

 static func disableAnimations(_ completion: () -&gt; Void) {
 CATransaction.begin()
 CATransaction.setDisableActions(true)
 completion()
 CATransaction.commit()
 }

}
</code></pre>

Usage :

<pre><code> CATransaction.disableAnimations {
 // things you don't want to animate
 }
</code></pre>

blocks|key|50634|text|层扩展：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|50635|extension+CALayer+{++++
++++var+areAnimationsEnabled:+Bool+{
++++++++get+{+delegate+==+nil+}
++++++++set+{+delegate+=+newValue+?+nil+:+CALayerAnimationsDisablingDelegate.shared+}
++++}
}

private+class+CALayerAnimationsDisablingDelegate:+NSObject,+CALayerDelegate+{
++++static+let+shared+=+CALayerAnimationsDisablingDelegate()
++++private+let+null+=+NSNull()

++++func+action(for+layer:+CALayer,+forKey+event:+String)+->+CAAction?+{
++++++++null
++++}
}|code-block|syntax|javascript|50636|用法：|50637|anyLayer.areAnimationsEnabled+=+false|50638|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Layer extension:

<pre><code>extension CALayer { 
 var areAnimationsEnabled: Bool {
 get { delegate == nil }
 set { delegate = newValue ? nil : CALayerAnimationsDisablingDelegate.shared }
 }
}

private class CALayerAnimationsDisablingDelegate: NSObject, CALayerDelegate {
 static let shared = CALayerAnimationsDisablingDelegate()
 private let null = NSNull()

 func action(for layer: CALayer, forKey event: String) -&gt; CAAction? {
 null
 }
}
</code></pre>

Usage:

<pre><code>anyLayer.areAnimationsEnabled = false
</code></pre>

blocks|key|51554|text|这是一个老问题，但问题仍然存在。有时你并不想要CALayer强加给你的动画。我对基于事务的方法并不满意，因为我只想关闭这些操作。一劳永逸。这是一个CALayer子类的Swift+4解决方案，允许选择是允许任何操作还是全局禁用它们。您还可以创建具有相同内容的CAShapeLayer、CATextLayer子类：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|51555|public+class+ActionCALayer:+CALayer+{
++++public+var+allowActions:+Bool+=+false

++++override+public+func+action(forKey+event:+String)+->+CAAction?+{
++++++++return+allowActions+?+super.action(forKey:+event)+:+nil
++++}
}|code-block|syntax|javascript|51556|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is an old question but the problem remains. Sometimes you don't want the animations that CALayer forces on you. I wasn't happy with the transaction based approach as I just wanted to turn these actions off. For good. Here's a Swift 4 solution to subclass CALayer to allow a choice whether to allow any action or globally disable them. You can also create CAShapeLayer, CATextLayer subclasses with the same contents:

<pre><code>public class ActionCALayer: CALayer {
 public var allowActions: Bool = false

 override public func action(forKey event: String) -&gt; CAAction? {
 return allowActions ? super.action(forKey: event) : nil
 }
}
</code></pre>

blocks|key|2532821|text|Swift+2|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2532822|我能够禁用所有动画，如下所示，其中myView是您正在使用的视图：|CODE|2532823|myView.layer.sublayers?.forEach+{+$0.removeAllAnimations()+}|code-block|syntax|javascript|2532824|顺便说一句，删除所有层：|2532825|myView.layer.sublayers?.forEach+{+$0.removeFromSuperlayer()+}|2532826|entityMap^0|0|7|0|H|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|Z|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|10|8|@]|D|@]|E|$]]|$1|P|3|Q|5|K|7|11|8|@]|D|@]|E|$L|M]]|$1|R|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|S|$]]

Swift 2

I was able to disable all animations as follows, where <code>myView</code> is the view you are working with:

<pre><code>myView.layer.sublayers?.forEach { $0.removeAllAnimations() }
</code></pre>

And as a side note, removing all layers:

<pre><code>myView.layer.sublayers?.forEach { $0.removeFromSuperlayer() }
</code></pre>

blocks|key|2532841|text|可重用的全局代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2532842|/**
+*+Disable+Implicit+animation
+*+EXAMPLE:+disableAnim{view.layer?.position+=+20}//Default+animation+is+now+disabled
+*/
func+disableAnim(_+closure:()->Void){
++++CATransaction.begin()
++++CATransaction.setDisableActions(true)
++++closure()
++++CATransaction.commit()
}|code-block|syntax|javascript|2532843|在代码中的任何位置添加此代码(全局作用域)|2532844|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<h3>Reusable global code:</h3>

<pre><code>/**
 * Disable Implicit animation
 * EXAMPLE: disableAnim{view.layer?.position = 20}//Default animation is now disabled
 */
func disableAnim(_ closure:()-&gt;Void){
 CATransaction.begin()
 CATransaction.setDisableActions(true)
 closure()
 CATransaction.commit()
}
</code></pre>

Add this code anywhere in your code (Globally scoped)

blocks|key|2532894|text|我完全同意Ryan的观点。他的答案是对于MacOS，对于iOS，您可以添加以下代码来创建一个NSNull()操作。此问题Disabling+implicit+animations+in+-[CALayer+setNeedsDisplayInRect:]和标题中的文档将我引向此处|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2532895|//+Disable+the+implicit+animation+for+changes+to+position
override+open+class+func+defaultAction(forKey+event:+String)+->+CAAction?+{
++++if+event+==+#keyPath(position)+{
++++++++return+NSNull()
++++}
++++return+super.defaultAction(forKey:+event)
}|code-block|syntax|javascript|2532896|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2244147/disabling-implicit-animations-in-calayer-setneedsdisplayinrect^0|1O|1U|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

I completely agree with Ryan. His answer is for MacOS, for iOS you add the following to create an NSNull() action. This question <a href="https://stackoverflow.com/questions/2244147/disabling-implicit-animations-in-calayer-setneedsdisplayinrect">Disabling implicit animations in -[CALayer setNeedsDisplayInRect:]</a> and the documentation in the header lead me here

<pre><code>// Disable the implicit animation for changes to position
override open class func defaultAction(forKey event: String) -&gt; CAAction? {
 if event == #keyPath(position) {
 return NSNull()
 }
 return super.defaultAction(forKey: event)
}
</code></pre>

It's driving me crazy! I am working on a drawing application. Let's say I am working on a <code>UIView</code> called sheet.

I am adding some sublayers to this view (<code>[sheet.layer addSublayer:...]</code>) and then I want to draw into them. To do so I am creating a <code>CGImageRef</code> and putting it into the layer's <code>contents</code>. But it's animated and I don't want that.

I tried everything:

<ul>
<li><code>removeAnimationForKey:</code></li>
<li><code>removeAllAnimations</code></li>
<li>set the actions dictionary</li>
<li>using the actionlayer <code>delegate</code></li>
<li><code>[CATransaction setDisableAnimations:YES]</code></li>
</ul>

It's seems correct. I don't understand why this layer is still animated ;_; 
Am I doing something wrong? Is there a secret way?

How to disable CALayer implicit animations?

Swift

MacOS

快把我逼疯了！我正在开发一个绘图应用程序。假设我正在处理一个名为sheet的UIView。我正在向这个视图([sheet.layer addSublayer:...])添加一些子层，然后我想要绘制它们。为此，我创建了一个CGImageRef并将其放入层的contents中。但它是动画的，我不想那样。我什么都试过了：removeAnimationForKey:removeAllAnimationss

问如何禁用CALayer隐式动画？
EN

回答 10

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问如何禁用CALayer隐式动画？EN

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问如何禁用CALayer隐式动画？
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