尺寸增加后圆形按钮变为圆角矩形 [英] Circular button becomes rounded rectangle after size increase

问题描述

我在iOS应用中创建了一个圆形按钮，更改了自动布局的宽度和高度限制(使按钮变大)后，它现在是一个圆角矩形而不是一个圆形.

我在Main.storyboard中定义了一个UIButton，在ViewController.swift中将其定义为IBOutlet ...

@IBOutlet weak var button: UIButton!

在viewDidLoad()中，我在运行时更改.cornerRadius以使其为圆...

button.layer.cornerRadius = button.frame.size.width / 2.0

在我更改应用程序UIButton的高度/宽度之前，此方法对我的应用程序完全有效.我为为什么按钮不再是圆圈而感到困惑.有什么想法吗?

解决方案

在viewDidLoad之后出现自动布局，因此您需要将调整移动到viewDidLayoutSubviews，以便将帧大小设置为正确的大小. /p>

I created a circular button in my iOS app and after changing the auto layout width and height constraints (so that the button is bigger) it is now a rounded rectangle instead of a circle.

I have a UIButton defined in Main.storyboard and as IBOutlet in ViewController.swift ...

@IBOutlet weak var button: UIButton!

In viewDidLoad() I am changing .cornerRadius at runtime to make it a circle ...

button.layer.cornerRadius = button.frame.size.width / 2.0

This approach worked perfectly for my app until I changed the height / width of the UIButton. I am stumped as to why the button is no longer a circle. Any ideas?

解决方案

Auto Layout happens after viewDidLoad, so you need to move your adjustment to viewDidLayoutSubviews so that the frame size will be set to the correct size.

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