本文介绍了如何使用 Swift 以编程方式渐变边框颜色 UIButton的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何以编程方式设计像这种渐变边框颜色的 UIButton?
How can I design programmatically UIButton like this gradient border color?
]
感谢您的帮助
推荐答案
let gradient = CAGradientLayer()
gradient.frame = CGRect(origin: CGPointZero, size: self.myButton.frame.size)
gradient.colors = [UIColor.blueColor().CGColor, UIColor.greenColor().CGColor]
let shape = CAShapeLayer()
shape.lineWidth = 2
shape.path = UIBezierPath(rect: self.myButton.bounds).CGPath
shape.strokeColor = UIColor.blackColor().CGColor
shape.fillColor = UIColor.clearColor().CGColor
gradient.mask = shape
self.myButton.layer.addSublayer(gradient)
Swift 3 版本:
let gradient = CAGradientLayer()
gradient.frame = CGRect(origin: CGPoint.zero, size: self.myButton.frame.size)
gradient.colors = [UIColor.blue.cgColor, UIColor.green.cgColor]
let shape = CAShapeLayer()
shape.lineWidth = 2
shape.path = UIBezierPath(rect: self.myButton.bounds).cgPath
shape.strokeColor = UIColor.black.cgColor
shape.fillColor = UIColor.clear.cgColor
gradient.mask = shape
self.myButton.layer.addSublayer(gradient)
这篇关于如何使用 Swift 以编程方式渐变边框颜色 UIButton的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除！