swift标签只剩下边框

Question

一起早上好,

我有这样的tableview:

示例:在单元格一中,我的右侧有一个红色文本标签.从它左边我包括一个像灰线的图像.

使用此代码,我可以设置一个完整的绿色边框:

    cell.Label.layer.borderWidth = 0.5
    cell.Label.layer.borderColor = UIColor.greenColor().CGColor

我可以在此文本标签的左侧仅设置边框吗？我使用swift ios8 - 所以,我需要一个快速的解决方案

Answer 1

这是您可以添加到项目中的扩展程序:

extension CALayer {

    func addBorder(edge: UIRectEdge, color: UIColor, thickness: CGFloat) {

        var border = CALayer()

        switch edge {
        case UIRectEdge.Top:
            border.frame = CGRectMake(0, 0, CGRectGetHeight(self.frame), thickness)
            break
        case UIRectEdge.Bottom:
            border.frame = CGRectMake(0, CGRectGetHeight(self.frame) - thickness, UIScreen.mainScreen().bounds.width, thickness)
            break
        case UIRectEdge.Left:
            border.frame = CGRectMake(0, 0, thickness, CGRectGetHeight(self.frame))
            break
        case UIRectEdge.Right:
            border.frame = CGRectMake(CGRectGetWidth(self.frame) - thickness, 0, thickness, CGRectGetHeight(self.frame))
            break
        default:
            break
        }

        border.backgroundColor = color.CGColor;

        self.addSublayer(border)
    }

}

并使用它像这样:

cell.Label.layer.addBorder(UIRectEdge.Top, color: UIColor.greenColor(), thickness: 0.5)

Answer 2

Swift 3版本:

extension CALayer {

    func addBorder(edge: UIRectEdge, color: UIColor, thickness: CGFloat) {

        let border = CALayer()

        switch edge {
        case UIRectEdge.top:
            border.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: thickness)
            break
        case UIRectEdge.bottom:
            border.frame = CGRect(x: 0, y: self.frame.height - thickness, width: self.frame.width, height: thickness)
            break
        case UIRectEdge.left:
            border.frame = CGRect(x: 0, y: 0, width: thickness, height: self.frame.height)
            break
        case UIRectEdge.right:
            border.frame = CGRect(x: self.frame.width - thickness, y: 0, width: thickness, height: self.frame.height)
            break
        default:
            break
        }

        border.backgroundColor = color.cgColor;

        self.addSublayer(border)
    }

}