火柴人
贴代码：
let path = UIBezierPath()
path.move(to: CGPoint.init(x: 175, y: 100))
path.addArc(withCenter: CGPoint.init(x: 150, y: 100), radius: 25, startAngle: 0, endAngle: CGFloat(2*Double.pi), clockwise: true)
path.move(to: CGPoint.init(x: 150, y: 125))
path.addLine(to: CGPoint.init(x: 150, y: 175))
path.addLine(to: CGPoint.init(x: 125, y: 225))
path.move(to: CGPoint.init(x: 150, y: 175))
path.addLine(to: CGPoint.init(x: 175, y: 225))
path.move(to: CGPoint.init(x: 100, y: 150))
path.addLine(to: CGPoint.init(x: 200, y: 150))
let shapeLayer = CAShapeLayer()
shapeLayer.strokeColor = UIColor.red.cgColor
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.lineWidth = 5
shapeLayer.lineJoin = kCALineJoinRound
shapeLayer.lineCap = kCALineCapRound
shapeLayer.path = path.cgPath
self.view.layer.addSublayer(shapeLayer)
效果图：
火柴人.png
遮罩
贴代码:
let view = UIView.init(frame: CGRect.init(x: 50, y: 50, width: 100, height: 100))
view.backgroundColor = UIColor.cyan
self.view.addSubview(view)
let path = UIBezierPath()
path.move(to: CGPoint.init(x: 0, y: 0))
path.addLine(to: CGPoint.init(x: 70, y: 0))
path.addLine(to: CGPoint.init(x: 100, y: 30))
path.addLine(to: CGPoint.init(x: 70, y: 60))
path.addLine(to: CGPoint.init(x: 70, y: 100))
path.addLine(to: CGPoint.init(x: 0, y: 100))
path.close()
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
view.layer.mask = shapeLayer
效果图：
遮罩.png
