ios - 制作自定义形状 imageview ios swift 4.2

Question

我是 ios 的新手。我正在尝试将 ImageView 的底部边框(不是整个底部的左侧或右侧)制作成曲线。任何人都可以指导我如何去做。

Here is the image of the border i want to acheive:

Answer 1

你可以这样做:

func curvedShapeFor(view: UIImageView, curvedPercent:CGFloat) ->UIBezierPath
{
    let path = UIBezierPath()
    path.move(to: CGPoint(x:0, y:0))
    path.addLine(to: CGPoint(x:view.bounds.size.width, y:0))
    path.addLine(to: CGPoint(x:view.bounds.size.width, y:view.bounds.size.height - (view.bounds.size.height*curvedPercent)))
    path.addQuadCurve(to: CGPoint(x:0, y:view.bounds.size.height - (view.bounds.size.height*curvedPercent)), controlPoint: CGPoint(x:view.bounds.size.width/2, y:view.bounds.size.height))
    path.addLine(to: CGPoint(x:0, y:0))
    path.close()

    return path
}

然后像这样申请:

let shapeLayer = CAShapeLayer(layer: imageView.layer)
shapeLayer.path = self.curvedShapeFor(view: imageView,curvedPercent: 0.6).cgPath
shapeLayer.frame = imageView.bounds
shapeLayer.masksToBounds = true
imageView.layer.mask = shapeLayer