我正在尝试在自定义 UIButton 子类上应用阴影和圆角以在 Storyboard上使用
这是我的代码:
import UIKit
class customButton: UIButton {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
setGradientBackground()
setShadowLayer()
}
private func setup() {
clipsToBounds = true
layer.cornerRadius = 8
}
private func setGradientBackground() {
let gradientLayer = CAGradientLayer()
gradientLayer.frame = bounds
gradientLayer.colors = [
UIColor(red: 0.18, green: 0.5, blue: 0.93, alpha: 1).cgColor,
UIColor(red: 0.18, green: 0.61, blue: 0.86, alpha: 1).cgColor
]
gradientLayer.locations = [0,1]
gradientLayer.startPoint = CGPoint(x: 0.25, y: 0.5)
gradientLayer.endPoint = CGPoint(x: 0.75, y: 0.5)
layer.insertSublayer(gradientLayer, at: 0)
}
private func setShadowLayer(){
let subLayer = CALayer()
subLayer.frame = bounds
subLayer.shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: 8).cgPath
subLayer.shadowColor = UIColor.red.cgColor
subLayer.shadowOpacity = 1
subLayer.shadowRadius = 12
subLayer.shadowOffset = CGSize(width: 0, height: 2)
layer.insertSublayer(subLayer, at: 0)
}
}
当我将 clipsToBounds 设置为 true 时，它会移除阴影，所以我决定添加一个新的子层 func setShadowLayer()到目前为止没有任何效果。
最佳答案
尝试在渐变层上设置 .cornerRadius:
gradientLayer.endPoint = CGPoint(x: 0.75, y: 0.5)
// add this line
gradientLayer.cornerRadius = 8
layer.insertSublayer(gradientLayer, at: 0)
我的结果:
关于ios - 在自定义 UIButton 子类上添加带圆角的阴影层，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52786058/