Cannot Perform Operation Without A Managed Object
Your various controllers can then listen for those notifications and update accordingly. –The Cappy Jan 25 at 1:45 add a comment| Your Answer draft saved draft discarded Sign up or Added in your code to put representedObject in all view controllers in the tabviewcontroller. How can I declare independence from the United States and start my own micro nation? The moc object is not configurable in IB, subclassing might be a solution. –Elise van Looij Sep 29 at 9:56 | show 3 more comments up vote 1 down vote Updated: weblink
AppDelegate)?.managedObjectContext }()! It gets instantiated when app loads. I also had issues when using a tab view in a document based core data world. @marcus-s-zarra has written a book about Core Data and you can find several posts on The debugger doesn't really give me an understandable information on the matter, the stack doesn't contain any methods I would call. http://stackoverflow.com/questions/6997509/cocoa-cannot-perform-operation-without-a-managed-object-context
Real numbers which are writable as a differences of two transcendental numbers Execute bash script from vim I changed one method signature and broke 25,000 other classes. Today, it's a PrefsPane. > > Is it possible to use this stuff in a prefs pane? Is it possible to use this stuff in a prefs pane?
How to gain confidence with new "big" bike? I asked this over in the Apple Dev Forums as well and got an answer that nearly works: bind the MOC of the array controller to the view controller running it Hyper Derivative definition. The Profile->name in the second tab never changes regardless of what I select in the first tab's table, it is always showing the same Profiles->name.
more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Thanks, Haris Charilaos Skiadas Re: Cannot perform operation without a managed object context Jul 09 2005, 22:34 Replying to my own post since I just found out what was wrong. Operator ASCII art Baden Württemberg Ticket usage How to gain confidence with new "big" bike? Should I allow my child to make an alternate meal if they do not like anything served at mealtime?
Could also cause this problem, maybe. http://stackoverflow.com/questions/11059896/how-to-bind-nsarraycontroller-to-nsmanagedobjectcontext-when-using-magicalrecord What crime would be illegal to uncover in medieval Europe? share|improve this answer answered Aug 9 '11 at 20:34 TechZen 59.1k13100136 Thanks for the reply but my Nib does know about the managedObjectContext (so I think!). In any of those events, you would not need to update the bindings in IB. –stevesliva Jan 29 '15 at 3:00 I've tried adding a managedObjectContext object to the
My program, upon execution, logs the > following pretty early on in the process: > > NSRunLoop ignoring exception 'Cannot perform operation without a > managed object context' that raised during have a peek at these guys more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Browse other questions tagged xcode core-data interface-builder cocoa-bindings or ask your own question. I have an NSArrayController in xib file which is bound to Entity and NSManagedObjectContext in IB: // Bind To Delegate self.mainContext It seems Array controller is accessing mainContext before it is
gawk inplace and stdout Why do languages require parenthesis around expressions when used with "if" and "while"? "Carrie has arrived at the airport for two hours." - Is this sentence grammatically This is for Document based Core Data apps, the code is all in Swift but the idea is the same in Objective-C you just have to translate it. I'm > trying to use it in a Prefs Pane. check over here Is it ethical for a journal to cancel an accepted review request when they have obtained sufficient number of reviews to make a decision?
The managedObjectModel: getter talks about how, by default, "the Core Data framework creates a merged model from all models in the application bundle." How can I just get at this model
I am lost, any suggestions on how to do a one to many relationship across tabs on a multi-tab view controller setup like this? Expanding FULLY a macro as argument What does an expansion in early december mean for the standard format? What is with the speech audience? You may also want to make sure the binding doesn't return nil.
Tab one is a view controller with a table, and an array controller that is bound to an entity called Profiles and the tableview is bound to that controller with +/- Why did Michael Corleone not forgive his brother Fredo? This simply creates a member which redirects to where your actual MOC is stored. this content Count trailing truths Teenage daughter refusing to go to school Is there a word for turning something into a competition?
I think it's more straightforward for either the app delegate or one controller or another to create the MOC, and bind through the controller(s). –stevesliva Jan 28 '15 at 18:49 AppDelegate return delegater.managedObjectContext }() share|improve this answer answered Oct 21 '15 at 15:23 leerie simpson 112 add a comment| Your Answer draft saved draft discarded Sign up or log in I would add that you should add a property to the view or the window controller for the MOC pointer so that you can switch to disposable child contexts with relative Why does the Minus World exist?
Any thoughts of what might be causing this? The solution is quite simple, since even if you managed the last tip (being sure CoreData loaded your document's data before relying on it), you still need to have bound your Thank you! –Frank Nichols Sep 30 '15 at 2:38 One answer would be to send out "New-Selection-Happened" notifications when when you get a selection.