Re: Sometimes all my menus are disabled
Re: Sometimes all my menus are disabled
- Subject: Re: Sometimes all my menus are disabled
- From: Kyle Sluder <email@hidden>
- Date: Sun, 12 Feb 2017 12:55:06 -0800
>> On Feb 12, 2017, at 12:36 PM, Andreas Falkenhahn <email@hidden> wrote:
>
>
>> On 12.02.2017 at 21:29 Kyle Sluder wrote:
>>
>> You’ve wired up every single menu item to a single action in your app
>> delegate? That’s certainly non-standard.
>
> It's really old code. It's an Xcode project I originally created on a
> PowerPC Mac some 10 years ago, so I don't really remember how I used
> Interface Builder back then. All I see is that every single menu item
> has an entry under "Sent Actions" that links to "AppDelegate: menuClick".
> The menu events are then processed in the "menuClick" method of my
> app delegate.
>
>> By default, menus automatically enable/disable their items based on
>> whether the target can perform the action. Perhaps your app delegate is
>> being deallocated, and thus the menu is walking the responder chain and
>> failing to find a responder that responds to -menuClick:?
>
> But how can that possibly happen? I'm certainly not deallocating the
> app delegate myself...
There are plenty of ways to write refcounting bugs. But the refcounting bug is just a theory. All we know for sure is that something is disabling the menu items. I assume you have not turned off the default autoenablesItems property on the menu, so that leaves a few possibilities:
1. The target of your menu items is being replaced with an object that does not respond to -menuClick:.
2. The target of your menu items is being deallocated, and a new object is being allocated in its place that does not respond to -menuClick:.
3. The target of your menu items is being deallocated, and NSMenuItem’s weak target pointer is being nilled out (special case of #1).
4. The menu has a delegate, and it implements of one of the menu update callbacks to disable the menu items.
5. Some arbitrary object in your app is grabbing a reference to the menu items and disabling them.
--Kyle Sluder
>
> --
> Best regards,
> Andreas Falkenhahn mailto:email@hidden
>
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