UIToolbar

UIToolbar is a user interface element in Apple's iOS and macOS operating systems, primarily used in iOS applications. It is a view that displays a row of items, such as buttons, which can be used to perform actions or navigate within an app. The UIToolbar is typically positioned at the top or bottom of the view controller's view, providing quick access to common functions.

The UIToolbar is highly customizable, allowing developers to add various types of items, including system items, custom items, and flexible space items. System items are predefined buttons that come with standard icons and actions, such as the "Done," "Cancel," and "Flexible Space" items. Custom items can be created using UIBarButtonItem, which can include custom views, images, or text. Flexible space items are used to add spacing between other items, making the toolbar more visually appealing and user-friendly.

One of the key features of the UIToolbar is its ability to automatically adjust the layout of its items when the device is rotated or when the keyboard appears. This ensures that the toolbar remains functional and visually consistent across different device orientations and screen sizes.

In addition to its functional role, the UIToolbar can also enhance the aesthetic appeal of an app. Developers can customize the appearance of the toolbar by setting properties such as the bar style, tint color, and background image. This allows the toolbar to blend seamlessly with the app's overall design and user interface.

Overall, the UIToolbar is a versatile and essential component in iOS app development, providing a convenient way for users to interact with an app and perform common actions efficiently.