如何将 UIView 的子视图居中 [英] How to center a subview of UIView

问题描述

我在 UIViewm 中有一个 UIView 并且我希望内部 UIView 始终居中于外部调整宽度和高度.

I have a UIView inside a UIViewm and I want the inner UIView to be always centered inside the outer one, without it having to resize the width and height.

我已经设置了支柱和弹簧，使其位于顶部/左侧/右侧/底部，而没有设置调整大小.但它仍然没有居中.有什么想法吗?

I've set the struts and springs so that it's on top/left/right/bottom without setting the resize. But it still doesn't center. Any idea?

推荐答案

Objective-C

yourSubView.center = CGPointMake(yourView.frame.size.width  / 2, 
                                 yourView.frame.size.height / 2);

迅捷

yourSubView.center = CGPoint(x: yourView.frame.size.width  / 2,
                             y: yourView.frame.size.height / 2)

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