Question

我正在将基于PUREMVC的应用程序从objective-c重新编码为Swift。

我现在正在创建一个表单并提交按钮，但它没有触发任何事件。既没有编辑文本字段，也没有按下按钮。文本字段上的键盘仍然显示在触摸上，但没有事件被触发。这是我的代码：

class LoginViewController: UIViewController, UITextFieldDelegate{

    var emailTF: UITextField!
    var passwordTF: UITextField!
    var submitBTN: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        self.view.backgroundColor = UIColor.redColor()

        // EMAIL
        self.emailTF = ViewElements.formTextField(FORM_DEFAULT_USERNAME)
        self.emailTF.tag = 100
        self.view.addSubview(self.emailTF)

        // PASSWORD
        self.passwordTF = ViewElements.formTextField(FORM_DEFAULT_PASSWORD)
        self.passwordTF.tag = 200
        self.view.addSubview(self.passwordTF)

        // SUBMIT
        self.submitBTN = ViewElements.formButtonSubmit(FORM_SUBMIT_TEXT)
        self.submitBTN.tag = 300
        self.submitBTN.addTarget(self, action: "pressedButton", forControlEvents: UIControlEvents.TouchUpInside)
        self.submitBTN.userInteractionEnabled = true
        self.view.userInteractionEnabled = true
        self.view.addSubview(self.submitBTN)


        // layout

        let tX = (SCREENWIDTH-NAVI_WIDTH)*0.5
        let tY = SCREENHEIGHT*0.3

        self.emailTF.frame = CGRect(x: tX, y: tY-NAVI_HEIGHT*1.2, width: NAVI_WIDTH, height: NAVI_HEIGHT)

        self.passwordTF.frame = CGRect(x: tX, y: tY+NAVI_HEIGHT*0.2, width: NAVI_WIDTH, height: NAVI_HEIGHT)

        self.submitBTN.frame = CGRect(x: tX, y: tY+NAVI_HEIGHT*1.6, width: NAVI_WIDTH, height: NAVI_HEIGHT)


        // events
        self.emailTF.delegate = self
        self.passwordTF.delegate = self

        print("---1---")

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    /*
    var visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .Light)) as UIVisualEffectView
    visualEffectView.frame = self.introImage.bounds
    self.introImage.addSubview(visualEffectView)
    visualEffectView.alpha = 0.0
    */

    // FORM EVENTS


    func textFieldDidBeginEditing(textField: UITextField) {
      print ("---")
    }

    func textFieldShouldEndEditing(textField: UITextField) -> Bool {
        print ("---")
        return false
    }


    func pressedButton(sender: UIButton!) {
        print("::")
    }   
}

如果您想查看我用来创建元素的Util：

class func formTextField(myText: String) -> UITextField
{
    let newTextField: UITextField = UITextField(frame: CGRect(x: 0, y: 0, width: NAVI_WIDTH, height: NAVI_HEIGHT));
    newTextField.text = myText as String
    newTextField.borderStyle = UITextBorderStyle.Line
    newTextField.backgroundColor = UIColor.colorWithAlphaComponent(UIColor.whiteColor())(0.5)
    newTextField.textAlignment = NSTextAlignment.Center

    return newTextField
}

class func formButtonSubmit(myText: String) -> UIButton
{
    let newButton: UIButton = UIButton()
    newButton.setTitle(myText, forState: .Normal)
    newButton.setTitleColor(UIColor.blackColor(), forState: .Normal)
    newButton.titleLabel!.font = UIFont(name: "InterstateCondensed", size: 45)
    newButton.titleLabel!.textColor = UIColor.blackColor()
    newButton.titleLabel!.textAlignment = .Center
    newButton.backgroundColor = UIColor.colorWithAlphaComponent(UIColor.whiteColor())(0.8)
    newButton.frame = CGRect(x: 0, y: 0, width: NAVI_WIDTH, height: NAVI_HEIGHT)

    return newButton
}

真的很奇怪，没有事件发生。任何人吗？

Answer 1

您可以在调用操作时使用Selector。

self.submitBTN.addTarget(self, action: Selector("pressedButton"), forControlEvents: UIControlEvents.TouchUpInside)

对于textField问题（我在这里猜测）问题可能是你在添加子视图后正在设置委托。

    // PASSWORD
    self.passwordTF = ViewElements.formTextField(FORM_DEFAULT_PASSWORD)
    self.passwordTF.tag = 200
    self.passwordTF.delegate = self
    self.view.addSubview(self.passwordTF)

    // SUBMIT
    self.submitBTN = ViewElements.formButtonSubmit(FORM_SUBMIT_TEXT)
    self.submitBTN.tag = 300
    self.submitBTN.addTarget(self, action: "pressedButton", forControlEvents: UIControlEvents.TouchUpInside)
    self.submitBTN.userInteractionEnabled = true
    self.view.userInteractionEnabled = true
    self.emailTF.delegate = self
    self.view.addSubview(self.submitBTN)

Answer 2

尝试将action: "pressedButton",替换为action: "pressedButton:",

或尝试删除pressedButton方法的参数，如果您不使用它。

Answer 3

您忘记在:之后添加pressedButton，以解决您的问题：

self.submitBTN.addTarget(self, action: Selector("pressedButton:"), forControlEvents: .TouchUpInside)

同样全能的Xcode为您提供了Storyboard，这将使您的生活更轻松，您无需从代码中设置所有参数，甚至代理和数据源也可以从中设置

Answer 4

我以为我发了一个答案。问题是，我是如何在不使用故事板（我不喜欢）的情况下将viewcontroller添加到teh窗口的。以上所有代码的想法都是正确的，但不解决我的问题。我这样修好了：

window.rootViewController = rootView
        window.makeKeyAndVisible()

这很简单。谢谢大家。

Swift - UIButton事件未触发

4 个答案: