在Swift的UIView中找到UILabel

本文介绍了在Swift的UIView中找到UILabel的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

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：

I'm trying to find my UILabels in my superview of my UIViewControllers.This is my code:

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)
    }
}

这是如何在Objective-C中推荐它，但在Swift中我只得到UIViews和CALayer。我肯定在提供给此方法的视图中有UILabel。我缺少什么？

This is how it is recommended to in Objective-C, but in Swift I get nothing but UIViews and CALayer. I definitely have UILabels in the view that is supplied to this method. What am I missing?

我的UIViewController中的调用：

The call in my UIViewController:

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

推荐答案

使用函数式编程概念可以更轻松地实现这一目标。

Using functional programming concepts you can achieve this much easier.

let labels = self.view.subviews.flatMap { $0 as? UILabel }

for label in labels {
//Do something with label
}

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