[英]Objective C: Create multiple UIPickerView with UITextFields programmatically
[英]UIPickerView as an inputView of multiple UITextFields
我的代码中有三个UITextField ,每个文本字段的inputView中都有一个UIPickerView 。
我想在UIPickerViewDelegate方法pickerView(_:didSelectRow:inComponent :)内确定哪个文本字段已调用/打开了UIPickerView 。
这是我尝试过的示例代码:
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")
}
}
还有其他更好的方法来解决这个问题吗?
(目标C或Swift,任何解决方案)
在您的文本字段委托上为文本字段分配inputview和标签
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
textField.inputView = pcv
pcv.tag = textField.tag
return true;
}
并最终获得pickerview的标签,以识别您点击了哪个文本字段。
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
print("pickerView == \(pickerView.tag)")
}
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