ios - UILabel 下边框和右边框

Question

我尝试为 uilabel 添加边框，但我只想有顶部、右侧和底部边框。

像这样:

                      |
        I am a label  |
                      |
       ----------------

我尝试使用这些代码，但它默认添加所有 4 个边

myLabel.layer.borderWidth = 1;
myLabel.layer.borderColor = UIColorCode.init(hexString: "#666666")

Answer 1

创建 UILabel 的子类并添加以下代码。这将根据您的需要绘制边框。

 override func drawRect(rect: CGRect) {

        let outerBorder = UIColor.blackColor()
        let lineWidth : CGFloat = 2.0
        let insetRect = rect.insetBy(dx: lineWidth/2, dy: lineWidth/2)
        let startingTopPoint   = CGPointMake(insetRect.origin.x,insetRect.origin.y)
        let endingTopPoint  = CGPoint(x: insetRect.maxX, y: insetRect.minY)

        let bottomLeft   = CGPoint(x: insetRect.minX, y: insetRect.maxY)
        let bottomRight     = CGPoint(x: insetRect.maxX, y: insetRect.maxY)


        let path = UIBezierPath()
        path.moveToPoint(startingTopPoint)
        path.addLineToPoint(endingTopPoint)
        path.lineWidth = 2.0
        path.addLineToPoint(bottomRight)
        path.addLineToPoint(bottomLeft)


        outerBorder.setStroke()
        path.stroke()
}