如何在NSMutableDictionary中添加值，如下所示

Question

我想在我的应用中添加可折叠菜单，因此我想将值添加到NSMutableDictionary。

任何人都可以帮我在NSMutableDictionary中添加值吗？下面是一个示例字典。

{
Items =      
(
     {
        Name = "Item 0";
        level = 0;
    },
    {
        Name = "Item 1";
        SubItems =             
        (
            {
                Name = "SubItem 0";
                level = 1;
            },
            {
                Name = "SubItem 1";
                level = 1;
            }
       );
       level = 0;
    },
    {
        Name = "Item 2";
        SubItems =             
        (
            {
                Name = "SubItem 1";
                level = 1;
            },
            {
                Name = "SubItem 2";
                level = 1;
            }
        );
        level = 0;
    },
    {
        Name = "Item 3";
        level = 0;
    },
    {
        Name = "Item 4";
        level = 0;
    },
    {
        Name = "Item 5";
        level = 0;
    },
    {
        Name = "Item 6";
        level = 0;
    },
    {
        Name = "Item 7";
        level = 0;
    },
    {
        Name = "Item 8";
        level = 0;
    }
);
}