ios - textFieldShouldBeginEditing 在所有文本字段上触发

Question

我想实现textFieldShouldBeginEditing，以便我可以为某些文本字段显示带有对话框的弹出窗口，而其他文本字段则为自由文本。

我是这样实现的:

   func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool{


    if(textField == self.petType)
    {
        petTypePicker = CZPickerView(headerTitle: "Pet Types", cancelButtonTitle: "Cancel", confirmButtonTitle: "Choose")
        petTypePicker?.delegate = self
        petTypePicker?.dataSource = self
        petTypePicker?.needFooterView = true
        petTypePicker?.headerBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        petTypePicker?.confirmButtonBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        petTypePicker?.show()
        return false
    }
    else if(textField == self.petBread)
    {
        breedPicker = CZPickerView(headerTitle: "Breeds", cancelButtonTitle: "Cancel", confirmButtonTitle: "Choose")
        breedPicker?.headerBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        breedPicker?.confirmButtonBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        breedPicker?.delegate = self
        breedPicker?.dataSource = self
        breedPicker?.needFooterView = true
        breedPicker?.show()
        return false
    }
    else if(textField == self.petColor){
        colourPicker = CZPickerView(headerTitle: "Colours", cancelButtonTitle: "Cancel", confirmButtonTitle: "Choose")
        colourPicker?.headerBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        colourPicker?.confirmButtonBackgroundColor = #colorLiteral(red: 0.4509803922, green: 0.3529411765, blue: 0.7647058824, alpha: 1)
        colourPicker?.delegate = self
        colourPicker?.dataSource = self
        colourPicker?.needFooterView = true
        colourPicker?.show()
        return false
    }
    else if(textField == self.petDateOfBirth){

        let currentDate = Date()

        DatePickerDialog().show(title: "DatePickerDialog", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", minimumDate: nil, maximumDate: currentDate, datePickerMode: .date) { (date) in
            if let dt = date {
                let dateFormatter = DateFormatter()

                dateFormatter.dateStyle = .medium

                self.petDateOfBirth.text = "\(dateFormatter.string(from: dt) as String)"
            }
        }

        return false
    }
    else{


        return true

    }

}

但由于某种原因，发生了这样的情况:

当返回为 false 时，它​​工作得很好，当返回为 true 时，它​​会为所有文本字段触发 textFieldShouldBeginEditing 方法，这使它们全部进入其 if 语句，从而触发所有对话框。

任何想法为什么我会遇到这种行为，请注意所有字段都在堆栈 View 内

谢谢

Answer 1

我很高兴它成功了;)。

使用实例属性 isFirstResponder() 检查您是否单击了正确的文本字段。在您的情况下，将 if 语句修改为 if self.petType.isFirstResponder() 即可解决问题。