Programmatically create grid view - objective-c

I am working on an app in which i am trying to implement something like this :-
1: First of all,i created a button(whose name here is "Create a new folder"). On clicking that button,an alertview will appear which will ask for the name of the button which is going to be created on click.
2: The above process will be repeated each and everytime when we click on "create a new folder" button.
3:The buttons which are created at runtime will be arranged in a grid view format.
Above shown screenshot will let you know about the required arrangement.
I've tried this by using UITableview and making columns in it. But i am not able to create folders at runtime.Please help me find any way to solve this. Suggestions will be highly appreciated. Thanks in advance.

Try UICollectionView if you can require iOS 6. There is a simple Guide on Apple's site too.

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