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Calayer actionforkey example: >> http://bit.ly/2hOGucB << (download)
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4 Aug 2014 concepts such as CALayer property animations and the role of actionForKey:, A notable example is the layer.contents property, which is
This method searches for the given action object of the layer. Actions define dynamic behaviors for a layer. For example, the animatable properties of a layer
In other words, even if CALayer doesn't know how to animate our custom . is a numeric value, and can be interpolated), but to keep the example simple, we'll for our time property, which we can do by overriding the -actionForKey: method:
24 Apr 2012 @interface MyLayer: CALayer @property ( nonatomic ) NSUInteger state; @ You can find a working example of a similar technique (in Swift,
30 Apr 2012 There is an excellent tutorial on the web that explains how to create a Override actionForKey:, initWithLayer:, and needsDisplayForKey:, and
9 Mar 2015 Guides and Sample Code Developer . When an appropriate event occurs on the layer, the layer calls its actionForKey: method to search for the action object associated (id<CAAction>)actionForLayer:(CALayer *)theLayer.
14 Mar 2014 For example, you can animate changes to properties of views or use transition Just change your actionForKey: method to something like that
17 Aug 2013 I have a CALayer subclass with float animAngle as property marked as @dynamic . I have implemented methods actionForKey , initWithLayer
8 Dec 2009 You would subclass CALayer. . Furthermore, if your understanding of layers is a bit fuzzy (for example, you did a double-take when I said The one nit I have is that it seems -addTarget:action:forKey: must be called prior to
1 Jul 2014 You override the actionForKey: method to add dynamic responses to property changes. @interface CustomLayer : CALayer @property (nonatomic, assign) to UIView animation calls, as you see in the following example.
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