Comments on: #7 Understanding notifications (part 2)

By: Thomas

Thomas — Fri, 11 Dec 2009 21:35:50 +0000

@Sig : Hi, action messages always take a single argument, which is the object that sent the message, so you can’t pass other arguments. You can read more about the target-action pattern here : http://developer.apple.com/mac/library/documentation/cocoa/conceptual/ObjectiveC/Articles/ocSelectors.html#//apple_ref/doc/uid/TP30001163-CH23-TPXREF132

What I could have done was to declare button and right_button as 2 ivars, then set their action to @selector(createNewWindow:), and implement createNewWindow like this

- (void)createNewWindow:(id)sender
{
if (sender===button)
// …
else // sender===right_button
// …
}

Hope this helps,
Thomas.

By: Sig

Sig — Fri, 11 Dec 2009 20:39:27 +0000

Hi Thomas,
I’m a cappuccino newbie (I discovered it earlier this morning) and after watching this screencast I have a question for you:

Instead creating two methods (createNewWindowLinkedToLeftSlider and createNewWindowLinkedToRightSlider) that both call createNewWindow with a different parameter, is not possible to call directly createNewWindow in setAction ( [right_button setAction:@selector(createNewWindow ...)] ; )?

Thanks

By: Tim

Tim — Fri, 24 Apr 2009 14:50:25 +0000

Good stuff. Thank you for taking the time to do this
Can’t wait for the rails with cappuccino stuff.