A TabBar is a control that is used to display and configure one or more bar button items in a tab bar for selecting between different subtasks, views, or modes in the iOS application. The TabBar is used in association with the TabBarController to present the list of tabs in the application. However, we can use the tab bar as stand-alone control in the application. The Tab Bar is the instance of the UITabBar class, which inherits UIView.
The tab bar always appears across the bottom edge of the screen. A UITabBar object contains one or more UITabBarItem objects. However, we can customize the appearance of the Tab Bar by changing its background color, image, or tint color according to the interface. When we use the UITabBarController object, we are provided with an in-built UITabBar object that can be customized using interface builder or programmatically.
