swift 查看に斜线を书く

Posted 2021-05-19

private func drawDiagonalLine(to view: UIView, frame: CGRect, color: UIColor) {
    let start = CGPoint(frame.origin.x + frame.width, frame.origin.y)
    let end = CGPoint(frame.origin.x, frame.origin.y + frame.height)
    let path = UIBezierPath()
    path.move(to: start)
    path.addLine(to: end)

    let shapeLayer = CAShapeLayer()
    shapeLayer.path = path.cgPath
    shapeLayer.strokeColor = color.cgColor
    shapeLayer.lineWidth = 1

    view.layer.addSublayer(shapeLayer)
}