image.png
lineLength：虚线长度
lineSpacing：虚线间的间距
private func drawDashLine(lineView : UIView,lineLength : Int ,lineSpacing : Int,lineColor : UIColor){
let shapeLayer = CAShapeLayer()
shapeLayer.bounds = lineView.bounds
shapeLayer.anchorPoint = CGPoint(x: 0, y: 0)
shapeLayer.strokeColor = lineColor.cgColor
shapeLayer.lineWidth = 1 //描边路径时使用的线宽。默认为1。
shapeLayer.lineJoin = CAShapeLayerLineJoin.round
shapeLayer.lineDashPattern = [NSNumber(value: lineLength),NSNumber(value: lineSpacing)]
let path = CGMutablePath()
path.move(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: lineView.bounds.size.width, y: 0))
shapeLayer.path = path
lineView.layer.addSublayer(shapeLayer)
}
使用示例：
let lineView = UIView()
lineView.frame = CGRect(x: 15, y: 100, width: UIScreen.main.bounds.size.width-30, height: 1)
view.addSubview(lineView)
drawDashLine(lineView: lineView, lineLength: 10, lineSpacing: 5, lineColor: .orange)
