我想制作一个渐变边框,如下图所示:
但我不知道该怎么做,即应该使用什么渐变色?如何设置我的 View 以显示类似图像的边框?
我正在使用以下代码来获取边框:
self.view.layer.borderColor = [UIColor orangeColor].CGColor;
self.view.layer.borderWidth = 2.0f;
最佳答案
这就是我所做的,并且效果很好
extension CALayer {
func addGradienBorder(colors:[UIColor],width:CGFloat = 1) {
let gradientLayer = CAGradientLayer()
gradientLayer.frame = CGRect(origin: CGPointZero, size: self.bounds.size)
gradientLayer.startPoint = CGPointMake(0.0, 0.5)
gradientLayer.endPoint = CGPointMake(1.0, 0.5)
gradientLayer.colors = colors.map({$0.CGColor})
let shapeLayer = CAShapeLayer()
shapeLayer.lineWidth = width
shapeLayer.path = UIBezierPath(rect: self.bounds).CGPath
shapeLayer.fillColor = nil
shapeLayer.strokeColor = UIColor.blackColor().CGColor
gradientLayer.mask = shapeLayer
self.addSublayer(gradientLayer)
}
}