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Editorial Team
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Asked: 2026-05-18T01:13:35+00:00

In my AppDelegate.m, in the application: didFinishLaunchingWithOptions: method, I put the following line: NSManagedObjectContext

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In my AppDelegate.m, in the application: didFinishLaunchingWithOptions: method, I put the following line:

NSManagedObjectContext *context = [self managedObjectContext];

But it says: AppDelegate may not respond to managedObjectContext. I saw this in a tutorial online, what am I doing wrong? I put #import <CoreData/CoreData.h> in my App_Prefix.pch file (see Adding Core Data to existing iPhone project) but that didn’t help.

The goal is to then set myViewController.context = context and then use that context to fetch some data in the view controller.

EDIT: Please see my comment to the answer of O. Begemann.

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1 Answer

  1. Editorial Team

    Create an empty sample app and make sure you check the Core Data checkbox. Then look at the boilerplate code for Core Data that has been generated in the application delegate. You need corresponding pieces of code in your app.

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