选择器仅在选择时出现

Question

I have a view controller that displays various UITextfield s to edit information. For one UITextfield I need a picker wheel to select predefined statuses.

Problem is I don't have enough space to integrate a picker wheel, is there a possibility to make it appear only when the text box is selected?

Answer 1

You could set the UIPickerView as the UITextField 's inputView .

This will ensure that the picker is shown automatically when the text field gets focus, and hides it when lost.

Eg

myTextField.inputView = self.myPickerView;

See the documentation on this property.

Answer 2

Assuming your "picker wheel" is a UIView, just hook up your controller as the UITextField's delegate and implement the following:

- (void)textFieldDidBeginEditing:(UITextField *)textField {
   self.pickerWheel.hidden = NO;
}

Answer 3

You need to call your UIPicker in (BOOL)textFieldShouldBeginEditing:

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{


    if (textField==self.yourtextfield) {
         //call your wheel in here 
    }
}

Look at How to Show UIPickerView when selecting UITextField