uibutton - shadowPath无法与UIButton一起使用

我正在创建这样一个按钮：

let authorizationButton = UIButton()
    let authorizationButtonHeight = 50.0
    let authorizationButtonX = 10.0
    let authorizationButtonWidth = UIScreen.mainScreen().bounds.size.width - authorizationButtonX * 2
    let authorizationButtonY = UIScreen.mainScreen().bounds.size.height - 10.0 - authorizationButtonHeight

    authorizationButton.frame = CGRectMake(authorizationButtonX, authorizationButtonY, authorizationButtonWidth, authorizationButtonHeight)

在那之后，我试图用我自己的阴影路径添加一个阴影，如下所示：

        authorizationButton.layer.shadowPath = UIBezierPath(rect:CGRectMake(authorizationButton.frame.origin.x, authorizationButton.frame.origin.y,
        authorizationButton.frame.size.width, authorizationButton.frame.size.height)).CGPath

    authorizationButton.layer.shadowColor = UIColor.blackColor().CGColor
    authorizationButton.layer.shadowOpacity = 1.0
    authorizationButton.layer.shadowRadius = 3.0
    authorizationButton.layer.shadowOffset = CGSizeMake(3.0, 3.0)

我真正的影子之路要复杂得多。
完全不显示阴影。
有什么问题吗？

最佳答案

问题与bezier路径有关：原点应为0,0。
更改代码如下：

authorizationButton.layer.shadowPath = UIBezierPath(rect:
    CGRectMake(0,
               0,
               authorizationButton.frame.size.width,
               authorizationButton.frame.size.height)).CGPath

关于uibutton - shadowPath无法与UIButton一起使用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24552638/