ios - 没有调用 textField 代表

Question

下面提到的是我的 textField 委托(delegate)方法，我正在使用 IQKeyBoardSwift 作为智能键盘。我尝试移除我的键盘，但我仍然没有收到任何关于接受“开始触摸”的方法的调用

func textFieldShouldReturn(textField: UITextField) -> Bool {

    if textField == textField {
        textFIeld2.becomeFirstResponder()
    }else if textField == textFIeld2 {
        textField3.becomeFirstResponder()
    }else if textField == textField3 {
        textFIeld4.becomeFirstResponder()
    }else if textField == textFIeld4 {
        textFIeld4.resignFirstResponder()
    }
    return true
}

// Resign first reponder on touch
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first! as UITouch
    let location = touch.location(in: view)

    if !textField1.frame.contains(location) {
        textField1.resignFirstResponder()
    }
    if !textFIeld2.frame.contains(location) {
        textFIeld2.resignFirstResponder()
    }
    if !textField3.frame.contains(location) {
        textField3.resignFirstResponder()
    }
    if !textFIeld4.frame.contains(location) {
        textFIeld4.resignFirstResponder()
    }

    self.textField1.endEditing(true)
    self.textFIeld2.endEditing(true)
    self.textField3.endEditing(true)
    self.textFIeld4.endEditing(true)
}

//MARK: UITextFieldDelegate
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
    print("textFieldShouldBeginEditing")
    return true
}

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

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {

    let newString = NSString(string: textField.text!).replacingCharacters(in: range, with: string)

    if(textField == textField1)
    {
        if(newString.characters.count) == 1 {
            print(textField1)
            textFIeld2.becomeFirstResponder()
            return false
        }

    }

    if(textField == textFIeld2)
    {
        if(newString.characters.count) == 1{
            textField3.becomeFirstResponder()
            return false
        }
    }
    if(textField == textField3)
    {
        if(newString.characters.count) == 1{
            textFIeld4.becomeFirstResponder()
            return false
        }
    }

    if(textField == textFIeld4)
    {
        if(newString.characters.count) == 1{
            buttonOutletSubmitCode.isHidden = false
            resignFirstResponder()
            return false
        }
    }
    return true
}

我希望我的光标在收到 1 个字符的输入后跳转到下一个文本字段。不幸的是，这并没有发生。

override func viewDidLoad() {
        super.viewDidLoad()
        textField1.delegate = self as? UITextFieldDelegate
        textFIeld2.delegate = self as? UITextFieldDelegate
        textField3.delegate = self as? UITextFieldDelegate
        textFIeld4.delegate = self as? UITextFieldDelegate
    }

这是我的viewDidLoad

Answer 1

添加:

添加协议(protocol) UITextFieldDelegate 并尝试将 textField1?.delegate = self 替换为 UITextFieldDelegate

替换

这不工作:

func textFieldDidBeginEditing(textField: UITextField) {
}

这行得通:

func textFieldDidBeginEditing(_textField: UITextField) {
}

用于跳转textField

参见:https://stackoverflow.com/a/18711677/3901620