你如何立即移动CALayer（没有动画） [英] How do you move a CALayer instantly (without animation)

问题描述

我正在尝试在iOS应用中拖动CALayer。

I'm trying to drag a CALayer in an iOS app.

一旦我改变其位置属性，它就会尝试动画到新位置并闪烁所有在这个地方：

As soon as I change its position property it tries to animate to the new position and flickers all over the place:

layer.position = CGPointMake(x, y)

如何立即移动CALayers？我似乎无法理解核心动画API。

How can I move CALayers instantly? I can't seem to get my head around the Core Animation API.

推荐答案

您希望将呼叫包裹在以下内容中：

You want to wrap your call in the following:

[CATransaction begin]; 
[CATransaction setValue: (id) kCFBooleanTrue forKey: kCATransactionDisableActions];
layer.position = CGPointMake(x, y);
[CATransaction commit];

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