Swift 中的 UIButton 没有注册触摸 [英] UIButton in Swift is not registering touches

问题描述

我正在尝试使用 Swift 创建一个 UIButton.它编译得很好，我可以在模拟器中看到我的按钮，但是当我点击它时，什么也没有发生.这是我正在使用的代码:

I'm trying to create a UIButton using Swift. It compiles fine and I can see my button in the simulator, but when I click it, nothing happens. This is the code I am using:

let settings = UIButton()
settings.addTarget(self, action: "touchedSet:", forControlEvents: UIControlEvents.TouchUpInside)
settings.setTitle("Settings", forState: .Normal)
settings.frame = CGRectMake(0, 530, 150, 50)
scrollView.addSubview(settings)

在同一个类中，这里是函数'touchedSet':

In the same class, here is the function 'touchedSet':

func touchedSet(sender: UIButton!) {
    println("You tapped the button")
}

我正在使用模拟器，因为我没有 iOS 8.0 设备，这可能是问题吗?

I'm using the simulator as I don't have an iOS 8.0 device, could that be the problem?

谢谢！

推荐答案

我看到这是一个老问题，但我昨天遇到了非常相似的问题.我的按钮在触摸时突出显示，但未触发操作.

I see it is an old question but I just faced very similar problem yesterday. My buttons were highlighted on touch but not firing the action.

我有两个视图控制器.一个视图覆盖其他视图，按钮位于顶部视图.

I have two view controllers. One view covers the others view and button is on the top view.

例如.

• Rootviewcontroller 有后视图

• Rootviewcontroller has back view

Topviewcontroller 有顶视图

Topviewcontroller has top view

如果我不将topviewcontroler 添加为rootviewcontroller 的childviewcontroller，顶视图上的按钮不会调用该操作.将 topviewcontroller 添加为 childviewcontroller 后，它开始工作.

The button on top view does not call the action if I don't add the topviewcontroler as childviewcontroller of the rootviewcontroller. After adding the topviewcontroller as childviewcontroller it started to working.

简而言之:只需尝试使用以下方法将按钮superview的视图控制器作为childviewcontroller添加到父视图viewcontroller

So in short: just try to add the view controller of buttons superview as childviewcontroller to the parent views viewcontroller with the following method

func addChildViewController(_ childController: UIViewController)

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