On May 21, 2010, at 12:09 AM, Quincey Morris wrote:
> On May 20, 2010, at 20:08, Steve Cronin wrote:
>
>> if (!prefPanelController) {
>> prefPanelController = [[PreferencesController alloc]
>> initWithWindowNibName:@"testPref"];
>> [prefPanelController setManagedObjectContext:[self
>> managedObjectContext]];
>> }
>> [prefPanelController showWindow:sender];
>>
>> No window opens and I get a console error: Cannot perform operation without
>> a managed object context
>
> This could well be a time, or order of things happening, problem.
>
> At the time the nib is loaded, the MOC property of the controller hasn't been
> set yet, so the array controller fetches a nil MOC, and throws an exception
> which aborts the rest of the loading process.
>
> You probably need to write a custom initializer for your custom window
> controller and pass the MOC as a parameter, instead of trying to set it later.
>
> That's my theory, anyway.
This specific issue is unlikely the case, as NSWindowController lazily loads
its nib--i.e. not until something asks for the window object. The nib would not
be loaded on initialization, unless subclassed to specifically do so.
Anyway, Steve, if you want useful answers, you must give specific information
using specific language.
>> However, I'm using CoreData and I want to pass the existing MOC to the pref
>> window:
>> I have added an array controller to the pref nib with its MOC set to files
>> owner's MOC in IB.
How did you set the MOC? Using bindings or outlet? If you used outlet, I am
sorry to say, that is very wrong.
In any case, you are being told the problem--your MOC is not being properly
set. Debug appropriately.
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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