How to draw border around a UILabel?(如何在 UILabel 周围绘制边框?)

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问题描述

Is there a way for UILabel to draw a border around itself? This is useful for me to debug the text placement and to see the placement and how big the label actually is.

解决方案

You can set label's border via its underlying CALayer property:

#import <QuartzCore/QuartzCore.h>

myLabel.layer.borderColor = [UIColor greenColor].CGColor
myLabel.layer.borderWidth = 3.0

Swift 5:

myLabel.layer.borderColor = UIColor.darkGray.cgColor
myLabel.layer.borderWidth = 3.0

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