is there a tree list component in objective C

i have to developp a planning app on the iPhone, a tree list view will help me a lot to structure the tasks like in a gantt diagramm

is there tree list component that i can use in interface builder or objective C?

Thanks for your help

No, Apple doesn't provide a tree-type UI component on iOS. Sorry. You'll have to write your own.

The closest you can get structure wise is using multiple UITableViewController instances in a UINavigationController (acts like a tree). However, if you are looking to generate a graphical representation, it might be worth taking a look at Core Plot. I can't recall if they had a Gantt but it would be a good place to start.

I think you can write a Class subclass of UIView.