Changing UITextField with UIPickerView, not calling EditingDidChange Action - ios

Question

Having a slight problem here.
The (IBAction) method I have set up for UITextfields EditingDidChange is not being called when the textField is changed when using a UIPickerView as input.
However, it works fine when using keyboard input.
Does the UIPickerView not send out its current selection until it's dismissed or something?
An alternative is to probably use the UIPickerView method, didSelectRow to perform the updates I'm after.
Is there there a unique way I'm unaware of that will get this to work how I want?

Answer 1

I think that you have something like this to setup your text field:
self.citys = #[#"Buenos Aires", #"Bahia Blanca", #"Azul",#"Pigue"];
self.namePicker = [[UIPickerView alloc] init];
self.namePicker.delegate = self;
self.namePicker.dataSource = self;
self.namePicker.showsSelectionIndicator = YES;
self.accessoryView = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(onNameSelection)];
[self.accessoryView setItems:[NSArray arrayWithObject:doneButton]];
self.textField.inputView = self.namePicker;
self.textField.inputAccessoryView = self.accessoryView;
And something like this to set the text when the user finish the selection:
- (void) onNameSelection{
NSInteger row = [self.namePicker selectedRowInComponent:0];
self.textField.text = [self.citys objectAtIndex:row];
[self.textField resignFirstResponder];
}
So... You don't need the action EditingChanged, because you know when the textfield.text is changed.
Maybe you also have something like this to change the text while the user select row in the picker:
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
self.textField.text = [self.citys objectAtIndex:row];
}
Again, you know when the textfield.text is changed.
So... Because YOU are the responsible of the changes on the textfield.text YOU are the responsible of call the function associated to the EditingChanged action.