I have an app with several views and controllers. They all work together fine in a TabBar. One of the views has a UIPickerView in it with a ToolBar above it with three tabbar items connected to IBActions, again working fine. I now want to use one of the tabbar items to change view instead of what I originally wanted it for. Trouble is I can't right now because I don't currently have a NavigationController in my @interface. What I currently have is @interface ParameterController: UIViewController UIPickerViewDataSource, UIPickerViewDelegate (the laster two are enclosed in less than and greater than signs, just can't use html, sorry). My question is can I just add a UINavigationController onto my @interface statement and, will this let me use [self.navigationController pushViewController: etc ....]