setting managed object context from nib

[odiggity]

I am trying to create a core data application and have had some success creating the entities from the app delegate directly. I just dumped some display to the NSLog to see that I was able to create an object and successfully fetch it later.

Now I want to move the managed object context to a viewcontroller that I made with the nib file, but it fails to run, because the managedObjectContext is set to zero. If I load the controller manually, I can set the managedObjectContext equal to the applicaiton's.

I tried to go to the interface builder and I add a view controller and set the class to MasterViewController, which is declared like this:

@interface MasterViewController : UIViewController {
	
	NSManagedObjectContext *managedObjectContext;

}

@property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;

@end

An in the app delegate, I include a pointer to the MasterViewController:

#import "MasterViewController.h"

@interface coreDataTestAppDelegate : NSObject <UIApplicationDelegate> {

    NSManagedObjectModel *managedObjectModel;
    NSManagedObjectContext *managedObjectContext;	    
    NSPersistentStoreCoordinator *persistentStoreCoordinator;

    UIWindow *window;
	MasterViewController *myMasterViewController;
}

@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet MasterViewController *myMasterViewController;
- (NSString *)applicationDocumentsDirectory;

@end

Finally in the interface builder I have MainWindow.xib and I add to it a viewcontroller with the class MasterViewController. I right click and set the view outlet to the window and the referencing outlet to be "myMasterViewController" in the app delegate. I know that I need to somehow link the managedObjectContext in myMasterViewController to the app delegate, but when I try to create the link, I don't see the managedObjectContext.

How do I initialize the managedObjectContext for a view controller in the interface builder to my app delegate?

Thanks for the help

[odiggity]

So I changed the definition of managedObjectContext to include IBOutlet, but I still have no where that I can connect it to using the interface builder. I added a sythesize call to the app delegate's managedObjectContext, but still nothing accepts the link.

[odiggity]

Finally figured this out, I was able to pass the app delegate as part of the viewcontroller, then access it directly:

How to assign managedObjectContext to a dynamic viewController??? - Stack Overflow

#import "MyAppDelegate.h" // Assuming you have a property called managedObjectContext in your MyAppDelegate

@interface MyViewController (PrivateMethgods)
@property (nonatomic, readonly) NSManagedObjectContext * managedObjectContext;
@end

@implementation MyViewController
@dynamic managedObjectContext

- (NSManagedObjectContext *)managedObjectContext {
    MyAppDelegate *appDelegate = (MyAppDelegate *)[UIApplication sharedApplication].delegate;
    return appDelegate.managedObjectContext;
}