Question

I have a uiviewcontroller with many UIButtons that are meant to be selected and kept pressed until touched on again. I define each button in the viewDidLoad and give all of them the same selector method (tapButton):

    [button1 addTarget:self action:@selector(tapButton:) forControlEvents:UIControlEventTouchUpInside];
    [button2 addTarget:self action:@selector(tapButton:) forControlEvents:UIControlEventTouchUpInside];
    ...

What I would like to do, is in the tabButton: method, to use the selector to determine which button was pressed, and then change its state with the following:

- (IBAction) tapButton:(id)sender
{
  if ( sender.selected ) {
    sender.highlighted = NO;
    sender.selected = NO;
} else {
    sender.highlighted = YES;
    sender.selected = YES;
}
}

You will notice that this is merely a pseuodo code since I can’t really do “sender.selected” or “sender.highlighted” but thats what I am trying to accomplish.

is there any in way in which I can accomplish this? I would hate to create 30 “tapButton” methods (thats the number of UIButtons I have, yes…) for managing each UIButton’s state.

Thanks a bunch!

Answer 1

You can set the tag of each button like this

button1.tag = 1;
button2.tag = 2;
....

Then in your selector

- (IBAction) tapButton:(id)sender
{
   switch((UIButton*)sender.tag){
     case 1:
     .....
   }
}