Swift - UIView扩展一个圆角设置三个角为圆角

实现如下UI

摘自SwifterSwift，设置[.bottomLeft, .topRight]即可。PS：被设置的View要设置Frame。

public extension UIView {
    /// SwifterSwift: Set some or all corners radiuses of view.
    ///
    /// - Parameters:
    ///   - corners: array of corners to change (example: [.bottomLeft, .topRight]).
    ///   - radius: radius for selected corners.
    func roundCorners(_ corners: UIRectCorner, radius: CGFloat) {
        let maskPath = UIBezierPath(
            roundedRect: bounds,
            byRoundingCorners: corners,
            cornerRadii: CGSize(width: radius, height: radius))

        let shape = CAShapeLayer()
        shape.path = maskPath.cgPath
        layer.mask = shape
    }
}