macOS One simple doubt Object-c example

[diogosgp]

Hi guys, I'm learning object-c with cocoa. I was studying this example and I a question has appeared in my mind. Follow the code:

-(IBAction)findSelectedButton: (id)senderes
{
	[COLOR="Red"]NSPopUpButtonCell *selCell = [senderes selectedCell];[/COLOR]
	NSLog(@"Selected cell is %d", selCell.tag);
	NSLog(@"Title is %@", selCell.title);
	NSInteger index = [senderes indexOfSelectedItem];
	NSLog(@"Selected item is %i", index);
}

I didn't understand why I have to use "selectedCell". Why only senderes?
Don't the code identifies that I'm selecting a option when I click on one item from the Pop button?

Cheers

 

[jiminaus]

Here's another way to code the same thing, which might be insightful.

-(IBAction)findSelectedButton: (id)senderes
{
  NSInteger index = [senderes indexOfSelectedItem];
  NSLog(@"Selected item is %ld", (long)index);
  NSLog(@"Title (from senderes) is %@", [senderes titleOfSelectedItem]);
  NSMenuItem* selMenuItem = [senderes selectedItem];
  NSLog(@"Title (from menu item) is %@", [selMenuItem title]);
  NSLog(@"Tag (from menu item) is %ld", (long)[selMenuItem tag]);
}

Note that NSPopUpButton doesn't have tagOfSelectedItem.

Personally I think getting the title and tag from the menu item is more kosher then getting it from the cell.

 

[diogosgp]

Here's another way to code the same thing, which might be insightful.

-(IBAction)findSelectedButton: (id)senderes
{
  NSInteger index = [senderes indexOfSelectedItem];
  NSLog(@"Selected item is %ld", (long)index);
  NSLog(@"Title (from senderes) is %@", [senderes titleOfSelectedItem]);
  NSMenuItem* selMenuItem = [senderes selectedItem];
  NSLog(@"Title (from menu item) is %@", [selMenuItem title]);
  NSLog(@"Tag (from menu item) is %ld", (long)[selMenuItem tag]);
}

Note that NSPopUpButton doesn't have tagOfSelectedItem.

Personally I think getting the title and tag from the menu item is more kosher then getting it from the cell.

Thank you, but my question is why can't I only use NSPopUpButtonCell *selCell = [senderes];

Why don't the program recognise that senderes is what I've selected?

Cheers

 

[jiminaus]

Thank you, but my question is why can't I only use NSPopUpButtonCell *selCell = [senderes];

Why don't the program recognise that senderes is what I've selected?

Cheers

Because it doesn't work that way.

EDIT: Actually it doesn't normally work this way. Where is this action connected to, the NSPopUpButton or the NSPopUpButtonCell inside the NSPopUpButton?