小编Cas*_*per的帖子

我正试图在我的UIViewControllers的超级视图中找到我的UILabels.这是我的代码:

func watch(startTime:String, endTime:String) {
    if superview == nil {println("NightWatcher: No viewcontroller specified");return}

    listSubviewsOfView(self.superview!)

}

func listSubviewsOfView(view: UIView) {
    var subviews = view.subviews

    if (subviews.count == 0) { return }

    view.backgroundColor = UIColor.blackColor()

    for subview in subviews {
        if subview.isKindOfClass(UILabel) {
            // do something with label..
        }
        self.listSubviewsOfView(subview as UIView)
    }
}

这是在Objective-C中推荐的方式,但在Swift中我除了UIViews和CALayer之外什么也得不到.我肯定在提供给这个方法的视图中有UILabel.我错过了什么？

我的UIViewController中的调用:

  NightWatcher(view: self.view).watch("21:00", endTime: "08:30") // still working on