Home/ Questions/Q 7991929
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-04T13:25:55+00:00

I’m debugging an iphone app and I’m seeing something I don’t understand fully. Based

  • 0

I’m debugging an iphone app and I’m seeing something I don’t understand fully.

Based on user’s selection, a UIView is being shown or hidden. Current code shows or hides the view with [view setHidden:NO] and [view setHidden:YES]. This doesn’t work: visually it’s as if these statements are simply ignored. However when I changed these to view.hidden = NO and view.hidden = YES respectively, everything is working as expected.

I was thinking that the two syntaxes are equivalent, but apparently not. For all other attributes (text, font, etc.), both work identically, so what’s so special about hidden?

EDIT: Here’s the copy/paste of some of my code. I’m working in XCode 4.3 with iPhone simulator 5.0

Here’s one example from my project.

IBOutlet UIView *panel;    //Connected in interface builder

===========

- (void)makePanelVisible:(BOOL)visible
{
    [panel setHidden:!visible];    //this does not work
    panel.hidden = !visible;       //this does work correctly.
}
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Thinking back about this, I remember running into the same issue almost 3 years ago, when iPhone 3 (not even 3G) was all the rage. I’m not sure why this happens, but it does – so I just deal with it by setting the property using the “dot” notation. I guess, this is one of those “don’t fix it if it ain’t broken” things (ok, it is sort of broken, but there’s an easy way around it, so I’m using it).

    • 0