Cannot create a managed object context on iOS
IosCore DataIos Problem Overview
I created a non core data project. I now want to use core data. In the build phases, I linked my binary with CoreData.framework. In my application delegate method, I want to manually create a managed object context like so
NSManagedObjectContext *aContext = [[NSManagedObjectContext alloc] init];
When I do the above, I get the following error,
Receiver 'NSManagedObjectContext' for class message is a forward declaration.
Any suggestions on what I might be doing wrong?
Ios Solutions
Solution 1 - Ios
You need to import CoreData/CoreData.h in your application delegate's header file:
#import <CoreData/CoreData.h>
Since you probably use it through outyour application you should put it in the precompiled header file, YourApp-Prefix.pch:
#ifdef __OBJC__
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>
#endif
Solution 2 - Ios
Just write #import < CoreData/CoreData.h > in your implementation file. It will work