Setting label.text on another Viewcontroller

[Sander]

Hi all,

This question must be submitted a million times already I think but I just
can't find the answer.

I call PopUpView from SubView1 which has a picker view in it.

Below is the code when a selection is made in the picker view.

What I want is, to pass that value back to a label on Subview1.

Below is my code which gives a SIGABRT message.

What am I doing wrong?

-(NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return[list objectAtIndex:row];
}

-(void)pickerView:(UIPickerView *)thePickerview didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{
    NSString *string = [NSString stringWithFormat:@"Test %@",[list objectAtIndex:row]];
    
    
    SubView1 *MyDelegate = [[UIApplication sharedApplication]delegate];

    MyDelegate.lbl2.text = string;
}

[Domele]

Setup a delegate for the class with the picker view in it. Give it one required delegate method

-(void)pickerViewController(PickerViewController *)pickerViewController didSelectText:(NSString *)text;

Then in didSelectRow, you would write:

[self.delegate pickerViewController:self didSelectText:string];

Obviously, for code clarity, replace pickerViewController with the name of your class.

[Sander]

Sorry to ask but I'm getting all confused here.

How do I setup a delegate for the class with the picker view in it?

Probably a simple solution but being honest, I'm used to programming Delphi for ten years and sometimes I mix things up.

[Domele]

The Basics of Protocols and Delegates

[Sander]

Tnx Domele,

Just had a quick look and it looks interesting. Ill study it later.

[Sander]

By the way, Im studying on Key Value Observing as well at the moment.

Is that in the right direction?