UIPickerView 作为多个 UITextField 的 inputView

Question

我有三个 UITextFields in my code and single UIPickerView as in inputView 所有文本字段。

我想确定 UIPickerViewDelegate method pickerView(_:didSelectRow:inComponent:).

中哪个文本字段具有 invoked/opened UIPickerView

这是我试过的示例代码：

let tf1: UITextField()
let tf2: UITextField()
let tf3: UITextField()
let pcv: UIPickerView()


tf1.inputView = pcv
tf2.inputView = pcv
tf3.inputView = pcv


// Picker view delegate
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    if (tf1.isFirstResponder) {
       print("tf1")
    } else if (tf2.isFirstResponder) {
       print("tf2")
    } else if (tf3.isFirstResponder) {
       print("tf3")
    } else {
       print("Any other view")
    }

}

有没有其他更好的方法来处理这个问题？

（Objective C 或 Swift，任意解）

Answer 1

在您的文本字段委托上为您的文本字段分配输入视图和标签

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
   textField.inputView = pcv
   pcv.tag =  textField.tag
    return true;
}

最后获取 pickerview 的标签以识别您点击的文本字段。

 func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        print("pickerView == \(pickerView.tag)")

}

UIPickerView 作为多个 UITextField 的 inputView

UIPickerView as an inputView of multiple UITextFields

objective-c

uipickerview

uitextfield

ios

swift