拿来老外的 layoutSubviews

bailang322

于 2015-06-10 16:53:51 发布

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本文深入探讨了iOS和Android平台中视图布局的工作原理，包括子视图的添加如何触发布局更新，以及滚动视图如何进行布局调整。同时，文章详细解释了设备旋转时的布局变化和视图大小改变时的布局处理机制。

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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 its frame set only if the size parameter of the frame is different
scrolling a UIScrollView causes layoutSubviews to be called on the scrollView, and its superview
rotating a device only calls layoutSubview on the parent view (the responding viewControllers primary view)
Resizing a view will call layoutSubviews on its superview