何时调用layoutSubviews方法？ [英] When is the layoutSubviews method called?

问题描述

我正在浏览教程，提到以下方法：

I am going through a tutorial that mentions the following method:

-(void)layoutSubviews

位于CustomerCell.m

located in CustomerCell.m

此方法何时调用应用执行？是自动调用吗？我没有看到任何回调。

When is this method called during the app execution? Is it automatically invoked? I dont see any callback.

推荐答案

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编辑：直接从博客中复制：

copied directly from the blog:

• init不会导致调用layoutSubviews（duh）


• addSubview导致在视图上调用layoutSubviews正在添加，它被添加到（目标视图）的视图，以及目标视图的所有子视图


• setFrame智能调用视图上的layoutSubviews，只有在尺寸参数为框架是不同的


• 滚动UIScrollView导致在scrollView上调用layoutSubviews，并且它是superview


• 旋转设备只调用父项上的layoutSubview view（响应的viewControllers主视图）


• removeFromSuperview - 仅在superview上调用layoutSubviews

• init does not cause layoutSubviews to be called (duh)
• addSubview causes layoutSubviews to be called on the view being added, the view it’s being added to (target view), and all the subviews of the target view
• setFrame intelligently calls layoutSubviews on the view having it’s frame set only if the size parameter of the frame is different
• scrolling a UIScrollView causes layoutSubviews to be called on the scrollView, and it’s superview
• rotating a device only calls layoutSubview on the parent view (the responding viewControllers primary view)
• removeFromSuperview – layoutSubviews is called on superview only

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