如何在底部有一个带有线角而不是圆角的 UIView

Question

我想用这个形状创建一个 UIView，它有线角。我怎样才能用 UIBezierPath 绘制它，或者有更简单的方法吗？任何帮助将不胜感激！

Answer 1

是的，您可能应该创建一条绘制该形状的路径。

可能处理器效率最高的方法是将 CAShapeLayer 作为子层安装到视图中，并将路径安装到形状层的路径中属性。考虑以下游乐场：

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {

    let shapeLayer = CAShapeLayer()
    let dogEarValue: CGFloat = 40.0

    func buildShape() {
        let box = view.bounds
        shapeLayer.frame = box

        let path = UIBezierPath()
        path.move(to: box.origin)
        path.addLine(to: CGPoint(x:box.maxX, y: box.origin.y))
        path.addLine(to: CGPoint(x:box.maxX, y: box.maxY - dogEarValue))
        path.addLine(to: CGPoint(x:box.maxX - dogEarValue, y: box.maxY))
        path.addLine(to: CGPoint(x:box.origin.x + dogEarValue, y: box.maxY))
        path.addLine(to: CGPoint(x:box.origin.x, y: box.maxY - dogEarValue))
        path.close()
        shapeLayer.path = path.cgPath
    }

    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white

        shapeLayer.fillColor = UIColor.black.cgColor
        shapeLayer.backgroundColor = UIColor.clear.cgColor
        view.layer.addSublayer(shapeLayer)

        let label = UILabel()
        label.text = "Hello World"
        label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
        label.text = "Hello World!"
        label.textColor = .black


        view.addSubview(label)
        self.view = view
    }

    override func viewDidLayoutSubviews() {
        buildShape()
    }
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()

如何在底部有一个带有线角而不是圆角的 UIView

How to have a UIView with line corners instead of rounded corners in the bottom

uiview

ios

uibezierpath

swift