Adding Core Data for Xcode 4 Projects

gistfile1.m

//
// Initialize the context. This is THE object you are going to use for all the data input and output.
//
NSManagedObjectContext* context=[[NSManagedObjectContext alloc] init];
//
// Initialize the model file, some black magic and you don't need to specify the model file name.
// You can point to it manually but since they introduced "versioned" data model, it's hard to figure out what name or path you should use.
//
NSManagedObjectModel* model=[NSManagedObjectModel mergedModelFromBundles:nil];
//
// The storage coordinator. I assume everyone would like to use sqlite, right?
//
NSPersistentStoreCoordinator* coord=[[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:model];
//
// Get the document path of the app. The sqlite file will be saved here once it's created.
//
NSString* documentPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
//
// Path to the sqlite file.
//
NSString* sqlitePath=[documentPath stringByAppendingString:@"/any-name-you-want-your-sqlite-to-be.sqlite"];
//
// Point the store coordinator to the sqlite file
//
[coord addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[NSURL fileURLWithPath:sqlitePath] options:nil error:nil];
//
// Link the context with the store coordinator and you are done. Now you own the properly setup context.
//
[context setPersistentStoreCoordinator:coord];