从视图中删除所有子层 [英] remove all subLayers from a view

问题描述

在动画中，我向视图添加了大量子图层，其中包含：

  [self.view.layer addSublayer：layer1]; 
 [self.view.layer addSublayer：layer2]; 
  

....

我会喜欢用动作删除所有子图层。
我已经尝试过这个类似问题的建议：

  rootLayer.sublayers = nil; 
  

但它不起作用...

你可以帮帮我吗？
比你好！

解决方案

子图层属性 CALayer 对象返回数组的副本。设置它不是零没有关于子层。但是这样做：

  for（calayer * layer in self.view.layer.sublayers）{
 [layer removeFromSuperlayer]; 
} 
  

或者，在Swift中

  self.view.layer.sublayers？.forEach {$ 0.removeFromSuperlayer（）} 
  

In an animation I added a lot of sublayers to a view, with:

[self.view.layer addSublayer:layer1];
[self.view.layer addSublayer:layer2];

....

I would like to remove all sublayers with an action. I already tried with this suggestion of a similar question:

rootLayer.sublayers = nil;

but it doesn't work...

Could you help me? Than you!

解决方案

The sublayers property of a CALayer object returns a copy of the array. Setting it no nil does nothing about the sublayers. This however will do:

for (CALayer *layer in self.view.layer.sublayers) {
    [layer removeFromSuperlayer];
}

Or, in Swift

self.view.layer.sublayers?.forEach { $0.removeFromSuperlayer() }

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