ios - 是否可以只用一个 var 来做到这一点？

Question

我似乎无法弄清楚如何只用一个变量来做到这一点？所以我想知道是否有可能做到这一点？还是这是向所有 3 个 UITextfields 添加按钮行的唯一方法？

 var border = CALayer(); var border2 = CALayer(); var border3 = CALayer()
        var width = CGFloat(0.7); var width2 = CGFloat(0.7); var width3 = CGFloat(0.7)

    border.borderColor = UIColor.whiteColor().CGColor
    border2.borderColor = UIColor.whiteColor().CGColor
    border3.borderColor = UIColor.whiteColor().CGColor

    border.frame = CGRect(x: 0, y: workServer.frame.size.height - width, width: 250, height: workServer.frame.size.height)
    border2.frame = CGRect(x: 0, y: workUsername.frame.size.height - width, width: 250, height: workUsername.frame.size.height)
    border3.frame = CGRect(x: 0, y: workPassword.frame.size.height - width, width: 250, height: workPassword.frame.size.height)

    border.borderWidth = width
    border2.borderWidth = width
    border3.borderWidth = width
    workServer.layer.addSublayer(border)
    workServer.layer.masksToBounds = true
    workUsername.layer.addSublayer(border2)
    workUsername.layer.masksToBounds = true
    workPassword.layer.addSublayer(border3)
    workPassword.layer.masksToBounds = true

Answer 1

您可以编写一个执行相同操作的函数。

func addBorder (UIView *view)
{
    var border = CALayer()
    var width = CGFloat(0.7)
    border.borderColor = UIColor.whiteColor().CGColor
    border.frame = CGRect(x: 0, y: view.frame.size.height - width, width: 250, height: view.frame.size.height)
    border.borderWidth = width
    view.layer.addSublayer(border)
    view.layer.masksToBounds = true;
}

你可以这样调用它:

addBorder(workServer)
addBorder(workUsername)
addBorder(workPassword)