how to remove all objects from Core Data

Question

how can I remove all objects? I know I can remove one by

[managedObjectContext deleteObject:objToDelete];

is it possible to delete all wit

Answer 1

I used stifin's code and updated it to use -performBlockAndWait:

- (BOOL)reset
{
    __block BOOL result = YES;

    [[self mainContext] performBlockAndWait:^{
        [[self mainContext] reset];

        NSArray* stores = [[self persistentStoreCoordinator] persistentStores];

        _mainContext = nil;
        _persistedContext = nil;

        for(NSPersistentStore* store in stores) {
            NSError* error;

            if(![[self persistentStoreCoordinator] removePersistentStore:store error:&error]) {
                debuglog(@"Error removing persistent store: %@", [error localizedDescription]);
                result = NO;
            }
            else {
                if(![[NSFileManager defaultManager] removeItemAtPath:store.URL.path error:&error]) {
                    debuglog(@"Error removing file of persistent store: %@", [error localizedDescription]);
                    result = NO;
                }
            }
        }

        _persistentStoreCoordinator = nil;
    }];

    return result;
}