如何禁用CALayer的隐式动画？ [英] How to disable CALayer implicit animations?

问题描述

它快把我逼疯了！我工作的绘图应用程序。比方说，我在的UIView 称为表工作。

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

我添加了一些子层这个观点（ [sheet.layer addSublayer：...] ），然后我要画到他们。要做到这一点我创建一个 CGImageRef ，并把它变成层的内容。但它的动画，我不希望出现这种情况。

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

我什么都试过：

• removeAnimationForKey：


• removeAllAnimations


• 设置操作字典


• 使用actionlayer 代表


• [CATransaction setDisableAnimations：YES]

• removeAnimationForKey:
• removeAllAnimations
• set the actions dictionary
• using the actionlayer delegate
• [CATransaction setDisableAnimations:YES]

它似乎是正确的。我不明白为什么这层仍是动画; _;结果
难道我做错了什么？有一个秘密的方式？

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

推荐答案

您必须通过在CATransaction包裹你的code明确禁用动画

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

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue
                 forKey:kCATransactionDisableActions];
layer.content = someImageRef;
[CATransaction commit];

随意张贴一些code。

Feel free to post some code.

最好的，

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