iOS 11中弃用的TopLayoutGuide和BottomLayoutGuide [英] TopLayoutGuide and BottomLayoutGuide Deprecated in iOS 11

问题描述

UIViewController的topLayoutGuide和bottomLayoutGuide在iOS 11中已弃用.应该替换什么?

UIViewController's topLayoutGuide and bottomLayoutGuide are deprecated in iOS 11. What should be the replacement?

推荐答案

以前在您的UIViewController中:

customView.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor).isActive = true
customView.bottomAnchor.constraint(equalTo: bottomLayoutGuide.topAnchor).isActive = true

现在您应该使用:

customView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
customView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true

请注意从bottomAnchor到topAnchor的更改.这是因为顶部布局向导是视图控制器顶部的矩形，因此为了将内容限制在顶部，您需要向导的底部锚点.新的保险柜布局指南是视图的矩形部分，没有任何条形图和其他内容遮挡，因此您需要顶部锚点.反之亦然，适用于底部布局指南.

Note the change from bottomAnchor to topAnchor. This is because the top layout guide was a rectangle at the top of the view controller, so in order to constraint your content to the top, you wanted the bottom anchor of the guide. The new safe are layout guide is a rectangle portion of the view unobscured by bars and other content, so you want the top anchor. And vice-versa for the bottom layout guide.

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