如何在swift ios中弯曲UIImageview的边？

我曾经

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这将圆角我希望圆角边缘

尝试在UIView中包裹图像

let view = UIImageView(CGRect(x: 0, y: 10, width: 100, height: 100))
view.cornerRadius = 10
self.mainView.addSubview(view)

Swift 4

let image = UIImageView(CGRect(x:0,y:0,width:100,height:100))
let view = UIView(CGRect(x:0,y:10,width:100,height:100))
view.cornerRadius = 10
view.addSubiew(image)
self.mainView.addSubview(view)

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标准技术是

为形状定义一个

UIBezierPath

使用该路径制作一个

CAShapeLayer

定义图像视图层的遮罩以使用该形状层

例如

收益率：

对于图像视图的尺寸，您必须使用

cornerRadius

和

lineWidth

的值，但希望这能说明这一点。我在上面代码中使用的默认值是300×300图像视图

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注意，我在

layoutSubviews

中实现了路径，以便它能够响应图像视图的大小调整。我还将它设置为可设计的@IBDesignable，这样，如果您碰巧使用了故事板，您就可以看到它在IB中呈现。

我认为您可以使用UIBezierPath来绘制这种复杂的UI。

let image = UIImageView(frame: CGRect(x:0,y:0,width:100,height:100))
let view = UIView(frame: CGRect(x:0,y:10,width:100,height:100))
view.layer.cornerRadius = 30
view.addSubview(image)
self.mainView.addSubview(view)

@IBDesignable
class RoundedCornerView: UIImageView {
    @IBInspectable
    var cornerRadius: CGFloat = 17 { didSet { setNeedsLayout() } }

    @IBInspectable
    var lineWidth: CGFloat = 75 { didSet { setNeedsLayout() } }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let rect = bounds.insetBy(dx: lineWidth / 2, dy: lineWidth / 2)

        let path = UIBezierPath()
        
        var point = CGPoint(x: rect.minX + cornerRadius, y: rect.minY + cornerRadius)
        path.move(to: point)
        
        var controlPoint = CGPoint(x: point.x + cornerRadius, y: rect.minY)
        point = CGPoint(x: rect.midX, y: rect.minY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        point = CGPoint(x: rect.maxX - cornerRadius, y: rect.minY + cornerRadius)
        controlPoint = CGPoint(x: point.x - cornerRadius, y: rect.minY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        controlPoint = CGPoint(x: rect.maxX, y: point.y + cornerRadius)
        point = CGPoint(x: rect.maxX, y: rect.midY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        point = CGPoint(x: rect.maxX - cornerRadius, y: rect.maxY - cornerRadius)
        controlPoint = CGPoint(x: rect.maxX, y: point.y - cornerRadius)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        controlPoint = CGPoint(x: point.x - cornerRadius, y: rect.maxY)
        point = CGPoint(x: rect.midX, y: rect.maxY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        point = CGPoint(x: rect.minX + cornerRadius, y: rect.maxY - cornerRadius)
        controlPoint = CGPoint(x: point.x + cornerRadius, y: rect.maxY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        controlPoint = CGPoint(x: rect.minX, y: point.y - cornerRadius)
        point = CGPoint(x: rect.minX, y: rect.midY)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        point = CGPoint(x: rect.minX + cornerRadius, y: rect.minY + cornerRadius)
        controlPoint = CGPoint(x: rect.minX, y: point.y + cornerRadius)
        path.addQuadCurve(to: point, controlPoint: controlPoint)
        
        path.close()
        
        let shapeLayer = CAShapeLayer()
        shapeLayer.lineWidth = lineWidth
        shapeLayer.path = path.cgPath
        shapeLayer.fillColor = UIColor.white.cgColor
        shapeLayer.strokeColor = UIColor.white.cgColor
        layer.mask = shapeLayer
        clipsToBounds = true
    }
}