nsmanagedobjectcontext

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where to implement Core Data?

I´m completely new to core data programming. i just try to find out where the best place for implementing the core data code would be. i´ve done the apple tutorial Locations and it worked well. now[详细]

2023-03-19 15:53 分类：问答
Singleton managedObjectContext

I want to use the singleton UIApplication to access the managedObjectContext of the AppDelegate. But when I write[详细]

2023-03-19 00:48 分类：问答
Core Data delay when switching NSPersistentStore files

I\'m developing an app with Core Data that periodically downloads all the data from a webservice. Since the download can fail or be cancelled by the user, I want to be able to roll back to the previou[详细]

2023-03-18 15:13 分类：问答
NSManagedObject: create on separate thread

I understand that Core Data is not thread safe and that NSManagedObjectContext and NSManagedObjects associated with a context cannot be passed from thread to thread.[详细]

2023-03-18 06:03 分类：问答
Core Data: Deleting Views Stored in Core Data

I am trying to delete views that have a yellow shadow from my main viewcontroller. It registers the number correctly but it doesn\'t delete. (It doesn\'t update the view I have tried to call setNeed[详细]

2023-03-17 23:34 分类：问答
Saving core data results in a crash

I have a problem with my core data. I am trying to save the context and I keep getting this error: \'NSInternalInconsistencyException\', reason: \'This 开发者_StackOverflow中文版NSPersistentStoreCoo[详细]

2023-03-17 16:07 分类：问答
Obtaining the NSManagedObjectContext

开发者_开发百科Well I was reading the Core Data tutorial for iOS on Apple\'s website and I don\'t quite get it.[详细]

2023-03-17 04:48 分类：问答
One or two managedObjectContext

I am currently developing an application which makes HTTP request (via AsiHTTPRequest) then parse a JSON stream. Basically there is a tableView/NSFetchedResultsController, which print objects fetched[详细]

2023-03-17 04:28 分类：问答
Passing Managed Object Data Through didSelectRow UIPickerView

I\'m a bit lost on how to pass my fetched managed object data through a didSelectRow UIPickerView action.[详细]

2023-03-16 11:27 分类：问答
NSManagedObjectContext: From a UIViewController, how do you get the ManagedObjectContext in iOS?

How do you know what the proper ManagedObjectContext is? Because I\'m not in the appDelegate (where I think the code is) and I keep getting crashes in my app - specifically, in the \'ViewDidLoad\' for[详细]

2023-03-16 06:13 分类：问答