UIInputViewController (自定义键盘)-未触发UIButton操作-为什么，哦，为什么？

Question

我确信这非常简单，但是我不能让一个简单的例子，使用一个UIInputViewController来工作。我有两个按钮，它们出现了，但点击它们没有任何效果。在谷歌搜索中，我发现了几个与此完全相似的问题--没有答案！我看了WWDC 2017年关于这个主题的视频，但他们有点忽略了这一点，他们的代码可以工作，但我不明白为什么我的代码不能。

代码(只是概念的证明)在下面，任何帮助都将不胜感激。

迈克尔

class ViewController: UIViewController {  

    @IBOutlet weak var testTF: UITextField!  

    override func viewDidLoad() {  
        super.viewDidLoad()     
        testTF.inputView = CustomView(nibName:nil,bundle:nil).inputView  
    }  

    override func didReceiveMemoryWarning() {  
        super.didReceiveMemoryWarning()  
    }  


}  
class MyButton:UIButton {  

     init(frame: CGRect, title:String) {  
        super.init(frame: frame)  
        backgroundColor = UIColor.lightGray  
        isUserInteractionEnabled = true  
        setTitle(title, for: .normal)  
    }  

    required init?(coder aDecoder: NSCoder) {  
        fatalError("init(coder:) has not been implemented")  
    }  


}  
class CustomView: UIInputViewController {  

    override init(nibName:String?, bundle:Bundle?) {  
        super.init(nibName:nibName, bundle:bundle)  
        let keyboard:UIView = UIView(frame: CGRect(x:0.0,y:0.0,width:768.0, height:240.0))  
        keyboard.backgroundColor = UIColor.red  

        let zeroKey:MyButton = MyButton(frame: CGRect(x:0.0,y:0.0,width:45.0,height:50.0), title:"0")  
        zeroKey.addTarget(self, action: #selector(clickMe(sender:)), for: .allEvents)  
        keyboard.addSubview(zeroKey)  

        let oneKey:UIButton = MyButton(frame: CGRect(x:50.0,y:0.0,width:45.0,height:50.0), title:"1")  
        oneKey.addTarget(self, action: #selector(clickMe(sender:)), for: .allEvents)  
        keyboard.addSubview(oneKey)  

        self.inputView?.backgroundColor = UIColor.blue  
        self.inputView?.frame = CGRect(x:0.0,y:0.0,width:UIScreen.main.bounds.width, height:240.0)  
        self.inputView?.isUserInteractionEnabled = true  
        self.inputView?.addSubview(keyboard)  
    }  

    required init?(coder aDecoder: NSCoder) {  
        fatalError("init(coder:) has not been implemented")  
    }  

    @objc func clickMe(sender:Any) {  
        print("hey, why am I not being called?")  
    }
}  

Answer 1

删除CustomView类。我只是这样做了，在我身边工作得很好：

    override func viewDidLoad() {
    super.viewDidLoad()
    let keyboard:UIView = UIView(frame: CGRect(x:0.0,y:0.0,width:768.0, height:240.0))
    keyboard.backgroundColor = UIColor.red

    let zeroKey:MyButton = MyButton(frame: CGRect(x:0.0,y:0.0,width:45.0,height:50.0), title:"0")
    zeroKey.addTarget(self, action: #selector(clickMe(sender:)), for: .allEvents)
    keyboard.addSubview(zeroKey)

    let oneKey:UIButton = MyButton(frame: CGRect(x:50.0,y:0.0,width:45.0,height:50.0), title:"1")
    oneKey.addTarget(self, action: #selector(clickMe(sender:)), for: .touchUpInside)
    keyboard.addSubview(oneKey) 
    testTF.inputView = keyboard
}
@objc func clickMe(sender:Any) {
    print("hey, why am I not being called?")
}

​

​

Answer 2

键盘扩展将在独立于主进程的单独进程中执行。除非您显式地将调试上下文设置为扩展，否则Xcode日志窗口中将只显示您在宿主程序中执行的日志记录。尽管你在上面没有这样说，但我怀疑你一开始是试图调试主机程序，然后改变了键盘的设计方案，结果就是它“就能工作”

有关如何为Xcode中的扩展设置调试会话的信息，请参阅https://developer.apple.com/library/archive/documentation/General/Conceptual/ExtensibilityPG/ExtensionCreation.html#//apple_ref/doc/uid/TP40014214-CH5-SW8上的苹果文档。