blocks|key|1116488|text|另外：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1116489|[CATransaction+begin];
[CATransaction+setValue:(id)kCFBooleanTrue+forKey:kCATransactionDisableActions];

//foo

[CATransaction+commit];|code-block|syntax|javascript|1116490|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|$]]

Also:

<pre><code>[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];

//foo

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

blocks|key|1116536|text|除了Brad+Larson's+answer：用于自定义图层(由您创建)+you+can+use+delegation，而不是修改图层的actions字典。这种方法更具动态性，性能也可能更好。它允许禁用所有隐式动画，而不必列出所有可设置动画的关键点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1116537|不幸的是，不可能将UIView用作自定义的层委托，因为每个UIView都已经是它自己的层的委托。但是您可以使用一个简单的助手类，如下所示：|1116538|@interface+MyLayerDelegate+:+NSObject
++++@property+(nonatomic,+assign)+BOOL+disableImplicitAnimations;
@end

@implementation+MyLayerDelegate

-+(id<CAAction>)actionForLayer:(CALayer+*)layer+forKey:(NSString+*)event
{
++++if+(self.disableImplicitAnimations)
+++++++++return+(id)[NSNull+null];+//+disable+all+implicit+animations
++++else+return+nil;+//+allow+implicit+animations

++++//+you+can+also+test+specific+key+names;+for+example,+to+disable+bounds+animation:
++++//+if+([event+isEqualToString:@"bounds"])+return+(id)[NSNull+null];
}

@end|code-block|syntax|javascript|1116539|用法(在视图中)：|1116540|MyLayerDelegate+*delegate+=+[[MyLayerDelegate+alloc]+init];

//+assign+to+a+strong+property,+because+CALayer's+"delegate"+property+is+weak
self.myLayerDelegate+=+delegate;

self.myLayer+=+[CALayer+layer];
self.myLayer.delegate+=+delegate;

//+...

self.myLayerDelegate.disableImplicitAnimations+=+YES;
self.myLayer.position+=+(CGPoint){.x+=+10,+.y+=+42};+//+will+not+animate

//+...

self.myLayerDelegate.disableImplicitAnimations+=+NO;
self.myLayer.position+=+(CGPoint){.x+=+0,+.y+=+0};+//+will+animate|1116541|有时，让视图的控制器作为视图的自定义子层的委托是很方便的；在这种情况下，不需要帮助器类，您可以直接在控制器中实现actionForLayer:forKey:方法。|1116542|重要提示:不要试图修改UIView底层的代理(例如启用隐式动画)--不好的事情会发生:)|1116543|注意:如果你想为层的重绘设置动画(而不是禁用动画)，那么在CATransaction中放入[CALayer+setNeedsDisplayInRect:]调用是没有用的，因为实际的重绘可能(而且可能会)在以后发生。最好的方法是使用自定义属性，如in+this+answer所述。|1116544|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/2244734/804678|1|http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreAnimation_guide/ReactingtoLayerChanges/ReactingtoLayerChanges.html#//apple_ref/doc/uid/TP40004514-CH7-SW2|2|https://stackoverflow.com/questions/4272694/tracking-a-core-animation-animation/4389936#4389936^0|1W|7|2|K|0|11|M|1|0|9|6|T|6|0|0|0|0|1K|M|0|B|6|0|T|D|19|W|3E|E|2|0^^$0|@$1|2|3|4|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]|$9|1E|A|1F|1|1G]]|E|$]]|$1|F|3|G|5|6|7|1H|8|@$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|1M|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1N|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1O|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1P|8|@$9|1Q|A|1R|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1S|8|@$9|1T|A|1U|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|1V|8|@$9|1W|A|1X|B|C]|$9|1Y|A|1Z|B|C]]|D|@$9|20|A|21|1|22]]|E|$]]|$1|W|3|-4|5|6|7|23|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]|16|$5|Z|10|11|E|$12|17]]]]

In addition to <a href="https://stackoverflow.com/a/2244734/804678">Brad Larson's answer</a>: for custom layers (that are created by you) <a href="http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreAnimation_guide/ReactingtoLayerChanges/ReactingtoLayerChanges.html#//apple_ref/doc/uid/TP40004514-CH7-SW2" rel="nofollow noreferrer">you can use delegation</a> instead of modifying layer's <code>actions</code> dictionary. This approach is more dynamic and may be more performant. And it allows disabling all implicit animations without having to list all animatable keys.

Unfortunately, it's impossible to use <code>UIView</code>s as custom layer delegates, because each <code>UIView</code> is already a delegate of its own layer. But you can use a simple helper class like this:

<pre><code>@interface MyLayerDelegate : NSObject
 @property (nonatomic, assign) BOOL disableImplicitAnimations;
@end

@implementation MyLayerDelegate

- (id&lt;CAAction&gt;)actionForLayer:(CALayer *)layer forKey:(NSString *)event
{
 if (self.disableImplicitAnimations)
 return (id)[NSNull null]; // disable all implicit animations
 else return nil; // allow implicit animations

 // you can also test specific key names; for example, to disable bounds animation:
 // if ([event isEqualToString:@"bounds"]) return (id)[NSNull null];
}

@end
</code></pre>

Usage (inside the view):

<pre><code>MyLayerDelegate *delegate = [[MyLayerDelegate alloc] init];

// assign to a strong property, because CALayer's "delegate" property is weak
self.myLayerDelegate = delegate;

self.myLayer = [CALayer layer];
self.myLayer.delegate = delegate;

// ...

self.myLayerDelegate.disableImplicitAnimations = YES;
self.myLayer.position = (CGPoint){.x = 10, .y = 42}; // will not animate

// ...

self.myLayerDelegate.disableImplicitAnimations = NO;
self.myLayer.position = (CGPoint){.x = 0, .y = 0}; // will animate
</code></pre>

Sometimes it's convenient to have view's controller as a delegate for view's custom sublayers; in this case there is no need for a helper class, you can implement <code>actionForLayer:forKey:</code> method right inside the controller.

Important note: don't try to modify the delegate of <code>UIView</code>'s underlying layer (e.g. to enable implicit animations) — bad things will happen :)

Note: if you want to animate (not disable animation for) layer redraws, it is useless to put <code>[CALayer setNeedsDisplayInRect:]</code> call inside a <code>CATransaction</code>, because actual redrawing may (and probably will) happen sometimes later. The good approach is to use custom properties, as described <a href="https://stackoverflow.com/questions/4272694/tracking-a-core-animation-animation/4389936#4389936">in this answer</a>.

blocks|key|1331715|text|实际上，我没有找到任何正确的答案。为我解决这个问题的方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1331716|-+(id<CAAction>)actionForKey:(NSString+*)event+{+++
++++return+nil;+++
}|code-block|syntax|javascript|1331717|然后，您可以使用其中的任何逻辑来禁用特定的动画，但由于我想将它们全部删除，所以我返回了nil。|1331718|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|$]]

Actually, I didn't find any of the answers to be the right one. The method that solves the problem for me was this:

<pre><code>- (id&lt;CAAction&gt;)actionForKey:(NSString *)event { 
 return nil; 
}
</code></pre>

Then you can whatever logic in it, to disable a specific animation, but since I wanted to removed them all, I returned nil.

blocks|key|1116644|text|根据山姆的回答和西蒙的困难。在创建CSShapeLayer之后添加委托引用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1116645|CAShapeLayer+*myLayer+=+[CAShapeLayer+layer];
myLayer.delegate+=+self;+//+<-+set+delegate+here,+it's+magic.|code-block|syntax|javascript|1116646|..。在"m“文件中的其他地方...|1116647|本质上与Sam的相同，但不能通过自定义的"disableImplicitAnimations“变量排列进行切换。更像是一种“硬连线”的方法。|1116648|-+(id<CAAction>)actionForLayer:(CALayer+*)layer+forKey:(NSString+*)event+{

++++//+disable+all+implicit+animations
++++return+(id)[NSNull+null];

++++//+allow+implicit+animations
++++//+return+nil;

++++//+you+can+also+test+specific+key+names;+for+example,+to+disable+bounds+animation:
++++//+if+([event+isEqualToString:@"bounds"])+return+(id)[NSNull+null];

}|1116649|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Based on Sam's answer, and Simon's difficulties... add the delegate reference after creating the CSShapeLayer:

<pre><code>CAShapeLayer *myLayer = [CAShapeLayer layer];
myLayer.delegate = self; // &lt;- set delegate here, it's magic.
</code></pre>

... elsewhere in the "m" file...

Essentially the same as Sam's without the ability to toggle via the custom "disableImplicitAnimations" variable arrangement. More of a "hard-wire" approach.

<pre><code>- (id&lt;CAAction&gt;)actionForLayer:(CALayer *)layer forKey:(NSString *)event {

 // disable all implicit animations
 return (id)[NSNull null];

 // allow implicit animations
 // return nil;

 // you can also test specific key names; for example, to disable bounds animation:
 // if ([event isEqualToString:@"bounds"]) return (id)[NSNull null];

}
</code></pre>

blocks|key|1116699|text|将其添加到您要实现-drawRect()方法的自定义类中。更改代码以满足您的需求，因为我的“不透明”成功地停止了交叉淡入淡出动画。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1116700|-(id<CAAction>)+actionForLayer:(CALayer+*)layer+forKey:(NSString+*)key
{
++++NSLog(@"key:+%25@",+key);
++++if([key+isEqualToString:@"opacity"])
++++{
++++++++return+(id<CAAction>)[NSNull+null];
++++}

++++return+[super+actionForLayer:layer+forKey:key];
}|code-block|syntax|javascript|1116701|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|$]]

Add this to your custom class where you are implementing -drawRect() method. Make changes to code to suite your needs, for me 'opacity' did the trick to stop cross-fade animation. 

<pre><code>-(id&lt;CAAction&gt;) actionForLayer:(CALayer *)layer forKey:(NSString *)key
{
 NSLog(@"key: %@", key);
 if([key isEqualToString:@"opacity"])
 {
 return (id&lt;CAAction&gt;)[NSNull null];
 }

 return [super actionForLayer:layer forKey:key];
}
</code></pre>

blocks|key|1116765|text|找到了一种更简单的方法来禁用CATransaction中的操作，该方法在内部为kCATransactionDisableActions密钥调用setValue:forKey:：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1116766|[CATransaction+setDisableActions:YES];|code-block|syntax|javascript|1116767|Swift：|1116768|CATransaction.setDisableActions(true)|1116769|entityMap^0|E|D|13|S|1Z|G|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$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]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

Found out a simpler method to disable action inside a <code>CATransaction</code> that internally calls <code>setValue:forKey:</code> for the <code>kCATransactionDisableActions</code> key:

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

Swift:

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

blocks|key|1331909|text|若要在更改CATextLayer的string属性时禁用烦人的(模糊)动画，可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1331910|class+CANullAction:+CAAction+{
++++private+static+let+CA_ANIMATION_CONTENTS+=+"contents"

++++@objc
++++func+runActionForKey(event:+String,+object+anObject:+AnyObject,+arguments+dict:+[NSObject+:+AnyObject]?)+{
++++++++//+Do+nothing.
++++}
}|code-block|syntax|javascript|1331911|然后像这样使用它(别忘了正确设置你的CATextLayer，例如正确的字体等)：|1331912|caTextLayer.actions+=+[CANullAction.CA_ANIMATION_CONTENTS:+CANullAction()]|1331913|你可以在这里看到我的CATextLayer的完整设置：|1331914|private+let+systemFont16+=+UIFont.systemFontOfSize(16.0)

caTextLayer+=+CATextLayer()
caTextLayer.foregroundColor+=+UIColor.blackColor().CGColor
caTextLayer.font+=+CGFontCreateWithFontName(systemFont16.fontName)
caTextLayer.fontSize+=+systemFont16.pointSize
caTextLayer.alignmentMode+=+kCAAlignmentCenter
caTextLayer.drawsAsynchronously+=+false
caTextLayer.actions+=+[CANullAction.CA_ANIMATION_CONTENTS:+CANullAction()]
caTextLayer.contentsScale+=+UIScreen.mainScreen().scale
caTextLayer.frame+=+CGRectMake(playbackTimeImage.layer.bounds.origin.x,+((playbackTimeImage.layer.bounds.height+-+playbackTimeLayer.fontSize)+/+2),+playbackTimeImage.layer.bounds.width,+playbackTimeLayer.fontSize+*+1.2)

uiImageTarget.layer.addSublayer(caTextLayer)
caTextLayer.string+=+"The+text+you+want+to+display"|1331915|现在您可以根据需要更新caTextLayer.string+=)|1331916|灵感来自this和this+answer。|offset|length|1331917|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/33426124/816017|1|https://stackoverflow.com/a/5144221/816017^0|0|0|0|0|0|0|0|4|4|0|9|4|1|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|16|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|18|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@$S|1C|T|1D|1|1E]|$S|1F|T|1G|1|1H]]|A|$]]|$1|U|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]|12|$5|X|Y|Z|A|$10|13]]]]

To disable the annoying (blurry) animation when changing the string property of a CATextLayer, you can do this:

<pre><code>class CANullAction: CAAction {
 private static let CA_ANIMATION_CONTENTS = "contents"

 @objc
 func runActionForKey(event: String, object anObject: AnyObject, arguments dict: [NSObject : AnyObject]?) {
 // Do nothing.
 }
}
</code></pre>

and then use it like so (don't forget to set up your CATextLayer properly, e.g. the correct font, etc.):

<pre><code>caTextLayer.actions = [CANullAction.CA_ANIMATION_CONTENTS: CANullAction()]
</code></pre>

You can see my complete setup of CATextLayer here:

<pre><code>private let systemFont16 = UIFont.systemFontOfSize(16.0)

caTextLayer = CATextLayer()
caTextLayer.foregroundColor = UIColor.blackColor().CGColor
caTextLayer.font = CGFontCreateWithFontName(systemFont16.fontName)
caTextLayer.fontSize = systemFont16.pointSize
caTextLayer.alignmentMode = kCAAlignmentCenter
caTextLayer.drawsAsynchronously = false
caTextLayer.actions = [CANullAction.CA_ANIMATION_CONTENTS: CANullAction()]
caTextLayer.contentsScale = UIScreen.mainScreen().scale
caTextLayer.frame = CGRectMake(playbackTimeImage.layer.bounds.origin.x, ((playbackTimeImage.layer.bounds.height - playbackTimeLayer.fontSize) / 2), playbackTimeImage.layer.bounds.width, playbackTimeLayer.fontSize * 1.2)

uiImageTarget.layer.addSublayer(caTextLayer)
caTextLayer.string = "The text you want to display"
</code></pre>

Now you can update caTextLayer.string as much as you want =)

Inspired by <a href="https://stackoverflow.com/a/33426124/816017">this</a>, and <a href="https://stackoverflow.com/a/5144221/816017">this</a> answer.

blocks|key|1331967|text|如果你曾经需要一个非常快速(但必须承认是老生常谈)的修复方法，那么它可能是值得去做的(Swift)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1331968|let+layer+=+CALayer()

//+set+other+properties
//+...

layer.speed+=+999|code-block|syntax|javascript|1331969|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|$]]

If you ever need a very quick (but admittedly hacky) fix it might be worth just doing (Swift):

<pre><code>let layer = CALayer()

// set other properties
// ...

layer.speed = 999
</code></pre>

blocks|key|1332000|text|在Swift中禁用隐式层动画|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1332001|CATransaction.setDisableActions(true)|code-block|syntax|javascript|1332002|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|$]]

To disable implicit layer animations in Swift

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

blocks|key|1332025|text|已更新，以便在iOS而非MacOS中仅快速禁用一个隐式属性动画|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1332026|//+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|1332027|另一个例子，在这种情况下，消除了两个隐式动画。|1332028|class+RepairedGradientLayer:+CAGradientLayer+{

++++//+Totally+ELIMINATE+idiotic+implicit+animations,+in+this+example+when
++++//+we+hide+or+move+the+gradient+layer

++++override+open+class+func+defaultAction(forKey+event:+String)+->+CAAction?+{
++++++++if+event+==+#keyPath(position)+{
++++++++++++return+NSNull()
++++++++}
++++++++if+event+==+#keyPath(isHidden)+{
++++++++++++return+NSNull()
++++++++}
++++++++return+super.defaultAction(forKey:+event)
++++}
}|1332029|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|$]]

Updated for swift and disabling only one implicit property animation in iOS not MacOS

<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>

Another example, in this case eliminating two implicit animations.

<pre><code>class RepairedGradientLayer: CAGradientLayer {

 // Totally ELIMINATE idiotic implicit animations, in this example when
 // we hide or move the gradient layer

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

I've got a layer with some complex drawing code in its -drawInContext: method. I'm trying to minimize the amount of drawing I need to do, so I'm using -setNeedsDisplayInRect: to update just the changed parts. This is working splendidly. However, when the graphics system updates my layer, it's transitioning from the old to the new image using a cross-fade. I'd like it to switch over instantly.

I've tried using CATransaction to turn off actions and set the duration to zero, and neither work. Here's the code I'm using:

<pre><code>[CATransaction begin];
[CATransaction setDisableActions: YES];
[self setNeedsDisplayInRect: rect];
[CATransaction commit];
</code></pre>

Is there a different method on CATransaction I should use instead (I also tried -setValue:forKey: with kCATransactionDisableActions, same result).

Disabling implicit animations in -[CALayer setNeedsDisplayInRect:]

Swift

MacOS

我有一个层，在它的-drawInContext:方法中有一些复杂的绘图代码。我正在尝试最小化我需要做的绘图量，所以我使用-setNeedsDisplayInRect:来只更新修改过的部分。这工作得很好。然而，当图形系统更新我的图层时，它使用交叉淡入淡出从旧图像过渡到新图像。我希望它能立即切换。我尝试过使用CATrans...

问在-[CALayer setNeedsDisplayInRect:]中禁用隐式动画
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问在-[CALayer setNeedsDisplayInRect:]中禁用隐式动画
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