将对象添加到NSMutableArray全局变量？

Question

我有一个UITableView控制器，当选择一行时，我想将该行的配方添加到NSMutableArray addedRecipesArray，这是AppDelegate的一个属性。但是，我可以告诉我，根据我设置的NSLog，实际上没有添加任何配方到addedRecipesArray。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    recipe = [recipesArray objectAtIndex:indexPath.row];
    NSLog(@"You have added %@ to the shoppingList", recipe.recipeName);
    [[[self appDelegate]addedRecipesArray] addObject:recipe];

    NSLog(@"The shopping list now contains:");
    for (Recipe *selectedRecipe in [[self appDelegate]addedRecipesArray])
    {
        NSLog(@"%@", selectedRecipe.recipeName);
    }



}