iOS 4.3

This article summarizes the key developer-related features introduced in iOS 4.3. This version of the operating system runs on all iOS-based devices. In addition to describing the key new features, this article lists the documents that describe those features in more detail.

For the latest updates and information, you should also see iOS 4.3 Release Notes. For the complete list of new APIs added in iOS 4.3, see iOS 4.3 API Diffs.

AirPlay Video Support

Support for playing video using AirPlay is included in the MPMoviePlayerController class. This support allows you to play video-based content on AirPlay–enabled hardware such as Apple TV. When the allowsAirPlay property of an active MPMoviePlayerController object is set to YES and the device is in range of AirPlay–enabled hardware, the movie player presents the user with a control for sending the video to that hardware. (That property is set to NO by default.) Supported formats include:

For web-based content, you can enable AirPlay Video in the QuickTime Plug-in or HTML5 video element as follows:

For more information about using the MPMoviePlayerController class to play video, see MPMoviePlayerController Class Reference.

Framework Enhancements

The following sections highlight the significant changes to frameworks and technologies in iOS 4.3. For a complete list of all new interfaces available in the system, see iOS 4.3 API Diffs.

AV Foundation

The AV Foundation framework includes the following enhancements:

For information about the classes of the UIKit framework, see AV Foundation Framework Reference.

Core Audio Frameworks

The Audio Unit and Audio Toolbox frameworks include the following enhancements:

For information about the functions and types of the Audio Unit framework, see Audio Unit Framework Reference. For information about the functions and types of the Audio Toolbox framework, see Audio Toolbox Framework Reference.

iAd

The ADInterstitialAd class is controller that you can use to present full-screen banners in your content. You present these banners in an existing view or as part of a transition from one page of content to another. For example, you might use this object to incorporate full-page ads into a page-based magazine layout.

For more information about the classes of the iAd framework, see iAd Framework Reference.

Media Player

The Media Player framework includes the following enhancements:

For more information about the classes of the Media Player framework, see Media Player Framework Reference.

UIKit

The UIViewController class added the disablesAutomaticKeyboardDismissal method, which you can use to override the default input view dismissal behavior.

For more information about the classes of the UIKit framework, see UIKit Framework Reference.