我试图创建一个自定义视图，顶部弯曲并在中间添加一个图像视图。
像这样：
但是我不太习惯UIBezierPath，所以我很困惑。
到目前为止，这是我所做的。
class DemoView: UIView {
var path: UIBezierPath!
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.darkGray
complexShape()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
complexShape()
}
func complexShape() {
path = UIBezierPath()
path.move(to: CGPoint(x: 0.0, y: 0.0))
path.addLine(to: CGPoint(x: self.frame.size.width/2 - 50.0, y: 0.0))
path.addLine(to: CGPoint(x: self.frame.size.width/2, y: 0.0))
path.addCurve(to: CGPoint(x: self.frame.size.width, y: 50.0),
controlPoint1: CGPoint(x: self.frame.size.width + 50.0, y: 25.0),
controlPoint2: CGPoint(x: self.frame.size.width - 150.0, y: 50.0))
path.addLine(to: CGPoint(x: self.frame.size.width, y: self.frame.size.height))
path.addLine(to: CGPoint(x: 0.0, y: self.frame.size.height))
path.close()
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
self.layer.mask = shapeLayer
}
}
extension CGFloat {
func toRadians() -> CGFloat {
return self * .pi / 180.0
}
}
最佳答案
下面的方法可让您将背景波效果添加到另一个view。然后，您需要为前景广场做的就是添加另一个视图。播放常数以更改波形/高度。
func addWaveBackground(to view: UIView){
let leftDrop:CGFloat = 0.4
let rightDrop: CGFloat = 0.3
let leftInflexionX: CGFloat = 0.4
let leftInflexionY: CGFloat = 0.47
let rightInflexionX: CGFloat = 0.6
let rightInflexionY: CGFloat = 0.22
let backView = UIView(frame: view.frame)
backView.backgroundColor = .gray
view.addSubview(backView)
let backLayer = CAShapeLayer()
let path = UIBezierPath()
path.move(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x:0, y: view.frame.height * leftDrop))
path.addCurve(to: CGPoint(x:view.frame.width, y: view.frame.height * rightDrop),
controlPoint1: CGPoint(x: view.frame.width * leftInflexionX, y: view.frame.height * leftInflexionY),
controlPoint2: CGPoint(x: view.frame.width * rightInflexionX, y: view.frame.height * rightInflexionY))
path.addLine(to: CGPoint(x:view.frame.width, y: 0))
path.close()
backLayer.fillColor = UIColor.blue.cgColor
backLayer.path = path.cgPath
backView.layer.addSublayer(backLayer)
}
传递要添加波浪效果的视图（通常是VC的主视图）。
关于ios - 波浪形(波浪形)顶部的自定义 View (快速)，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58915813/