如何在swift 4中禁用otp屏幕中文本字段上光标的中间外观

Posted 2023-02-23

【中文标题】如何在swift 4中禁用otp屏幕中文本字段上光标的中间外观

【英文标题】：how the disable the intermediate appearance of cursor on textFields in a otpscreen in swift 4

【发布时间】：2019-02-01 05:04:41

【问题描述】：

我有一个带有 6 个文本字段的 OTP 屏幕，当我点击特定的文本字段时，我需要光标不要移动到特定的文本字段。

我已经实现了自动将光标从一个文本字段移动到另一个文本字段的代码，但是如果我触摸特定的文本字段（比如说第四个），光标就会移动到那里。

请帮我解决这个问题，并提前致谢。

我的 OTP 屏幕：

我的代码：

func setDelegateAndTargetForAllTextFields() 

    textField1.delegate = self
    textField2.delegate = self
    textField3.delegate = self
    textField4.delegate = self
    textField5.delegate = self
    textField6.delegate = self

    textField1.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)
    textField2.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)
    textField3.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)
    textField4.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)
    textField5.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)
    textField6.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: UIControl.Event.editingChanged)





@IBAction func otpBtnTapped(_ sender: UIButton) 

    if let text1 = textField1.text, let text2 = textField2.text, let text3 = textField3.text, let text4 = textField4.text,let text5 = textField5.text,let text6 = textField6.text 

        if text1+text2+text3+text4+text5+text6 == ""

            showAlert(message: "Otp Cannot be empty!.")

            textField1.text = ""
            textField2.text = ""
            textField3.text = ""
            textField4.text = ""
            textField5.text = ""
            textField6.text = ""
            textFieldIntermediateEditingDisabled()

        
        else

            let setPinVC = self.storyboard?.instantiateViewController(withIdentifier: "pinVC") as! SetPinVC
            self.navigationController?.pushViewController(setPinVC, animated: true)




        

    



@objc func textFieldDidChange(textField: UITextField) 

    let text = textField.text

    if text?.count == 1 

        switch textField

        case textField1:
            //if textField2.isEnabled == false
                //textField2.isEnabled = true
            //
            textField2.becomeFirstResponder()
        case textField2:
            //if textField3.isEnabled == false
               // textField3.isEnabled = true
           // 
            textField3.becomeFirstResponder()
        case textField3:
            //if textField4.isEnabled == false
                //textField4.isEnabled = true
            //
            textField4.becomeFirstResponder()
        case textField4:
            //if textField5.isEnabled == false
                //textField5.isEnabled = true
            //
            textField5.becomeFirstResponder()
        case textField5:
           // if textField6.isEnabled == false
                //textField6.isEnabled = true
            //
            textField6.becomeFirstResponder()
        default:
            break

        

    

    if text?.count == 0  

        switch textField 

        case textField1:
            //if textField1.isEnabled == false
                //textField1.isEnabled = true
            //
            textField1.becomeFirstResponder()
        case textField2:
           // if textField1.isEnabled == false
                //textField1.isEnabled = true
            //
            textField1.becomeFirstResponder()
        case textField3:
            //if textField2.isEnabled == false
                //textField2.isEnabled = true
            //
            textField2.becomeFirstResponder()
        case textField4:
            //if textField3.isEnabled == false
                //textField3.isEnabled = true
            //
            textField3.becomeFirstResponder()
        case textField5:
            //if textField4.isEnabled == false
               // textField4.isEnabled = true
            //
            textField4.becomeFirstResponder()
        case textField6:
            //if textField5.isEnabled == false
                //textField5.isEnabled = true
            //
            textField5.becomeFirstResponder()
        default:
            break

        
    



func textFieldShouldReturn(_ textField: UITextField) -> Bool 

    textField.resignFirstResponder()

    return true




func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool 


    let maxLength = 1
    let currentString: NSString = textField.text! as NSString
    let newString: NSString =
        currentString.replacingCharacters(in: range, with: string) as NSString
    return newString.length <= maxLength

【问题讨论】：

请分享您的代码，然后我们提供如何禁用其他文本字段的想法。

您需要哪种类型的验证，我的意思是如果 !txt.text.isEmpty if tap its go the specific field or else

【参考方案1】：

您可以使用textFieldShouldBeginEditing来检查和允许/放弃 textField 以开始这样的编辑

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool          
    return true // edit the condition according to your requirement

编辑

如果您想检查并允许前一个文本字段是否具有值，您可以执行类似的操作，只需将所有文本字段放入一个数组中，序列从一到依此类推

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool 
    let textfields : [UITextField] = [textfield1,textfield2,textfield3] // just to demonstrate
    if (textField == textfield1)  return true 
    var previousTextfield : UITextField?
    for textfield in textfields
        if let pTextfiled = previousTextfield,let value = pTextfiled.text
            return value.isEmpty ? false : (textfield == textField)
        
        previousTextfield = textfield
    
    return false

注意：我没有测试此代码只是根据要求添加答案让我知道这是您想要的还是其他。

谢谢。

【讨论】：

我的要求只是光标不应该在中间文本字段上。所以你能说一下条件吗..

"intermediate" 没有说明实际要求？你的意思是你不想允许如果之前的文本字段是空的，对吧？

编辑了答案，请尝试让我知道@vivekananda

只有在 textfield1 中没有文本但如果我们在 textField2 中有一些文本并且如果我点击 textfield4 时它会移动到那里

现在当我第一次进入 otp 时，它会停在第二个 textField 本身