objective c - add a NSArray to NSMutableArray

Question

i want to add a NSArray to my NSMutable ( init in the appdelegate )

this is my code, the method is call each time a button (male, female, couple) is pressed so an NSArray has to be add to the MutableArray but i don't know i tried stuff but doesnt work. :

     - (void) sexChoosen:(NSString *) sexe
{
    NSError *err;
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Boxes" inManagedObjectContext:context];
    [request setEntity:entity];

    NSArray *arrayForPredicate = [context executeFetchRequest:request error:&err];
    NSPredicate *sex;

    sex = [NSPredicate predicateWithFormat:@"sexe = %@", sexe];

    NSArray  *BoxWithSex = [arrayForPredicate filteredArrayUsingPredicate:sex];
    //NSMutableArray* tmp = [self createMutableArray:BoxWithSex];

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    NSLog(@"FIRST  %@", appDelegate.myArray);

// HERE IS THE CODE TO ADD THE ARRAY TO MY NSMUTABLE ARRAY = AppDelegate *appDelegate

    NSLog(@"SECOND %@", appDelegate.myArray);

}

Answer 1

From the NSMutableArray documentation:

"addObjectsFromArray: Adds the objects contained in another given array to the end of the receiving array’s content."