A set of methods that support the positioning of a bar that conforms to the
Navigation bars, toolbars, and search bars all have delegates that support the
UIBarPositioning protocol. The delegate can use the method of this protocol to specify the bar’s position when that bar is moved to a window. The
UIToolbarDelegate protocols extend this protocol to allow for the positioning of those bars on the screen.
An abstract superclass for items that can be added to a bar that appears at the bottom of the screen.
A control that supports navigation of hierarchical content, most often used in navigation controllers.
A control that displays one or more buttons along the bottom edge of your interface.
A control that displays one or more buttons in a tab bar for selecting between different subtasks, views, or modes in an app.