label - 带有对角删除线的 UILabel 文本

Question

我想用 UILabel 文字做出这样的效果

我怎样才能做到这一点？我在网上没有找到任何帮助；我刚刚找到了水平线的帮助

PS：对不起我的英语不好，我是意大利人:)

Answer 1

enoktate 的答案已更新为Swift 4.2，并作为扩展编写

extension UILabel {
    /// Strikes through diagonally
    /// - Parameters:
    /// - offsetPercent: Improve visual appearance or flip line completely by passing a value between 0 and 1
    func diagonalStrikeThrough(offsetPercent: CGFloat = 0.1) {
        let linePath = UIBezierPath()
        linePath.move(to: CGPoint(x: 0, y: bounds.height * (1 - offsetPercent)))
        linePath.addLine(to: CGPoint(x: bounds.width, y: bounds.height * offsetPercent))

        let lineLayer = CAShapeLayer()
        lineLayer.path = linePath.cgPath
        lineLayer.lineWidth = 2
        lineLayer.strokeColor = textColor.cgColor
        layer.addSublayer(lineLayer)
    }
}

Answer 2

看起来现在回答你为时已晚，但这对未来的谷歌用户很有帮助。可以通过将 CAShapeLayer 作为子图层添加到标签来实现对角删除线，如下所示：

    let linePath = UIBezierPath()
    linePath.moveToPoint(CGPointMake(0, yourLabel.bounds.height))
    linePath.addLineToPoint(CGPointMake(yourLabel.bounds.width, 0))

    let lineLayer = CAShapeLayer()
    lineLayer.path = linePath.CGPath
    lineLayer.lineWidth = 2
    lineLayer.strokeColor = UIColor.lightGrayColor().CGColor
    yourLabel.layer.addSublayer(lineLayer)