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 AirPlayenabled 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 AirPlayenabled hardware, the movie player presents the user with a control for sending the video to that hardware.
You must explicitly opt-in to AirPlay playback for any movie players you create. The allowsAirPlay property of MPMoviePlayerController is set to NO by default. For more information about using this 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:
The AV Foundation framework added the AVPlayerItem, AVPlayerItemAccessLogEvent, and AVPlayerItemErrorLogEvent classes for tracking network playback statistics.
The AVMetadataItem class added support for loading key data asynchronously.
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:
The AudioUnitParameterHistoryInfo struct (in the Audio Unit framework) along with supporting audio unit properties adds the ability to track and use parameter automation history.
The ExtendedAudioFormatInfo struct (in the Audio Toolbox framework) lets you specify which codec to use when accessing the kAudioFormatProperty_FormatList property.
The kAFInfoDictionary_SourceBitDepth dictionary key and the kAudioFilePropertySourceBitDepth property (in the Audio Toolbox framework) provide access to the bit depth of an audio stream.
The kAudioConverterErr_NoHardwarePermission result code (in the Audio Toolbox framework) indicates that a request to create a new audio converter object cannot be satisfied because the application does not have permission to use the requested hardware codec.
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 ADInterstitialView class is a view that you can use to embed advertisements more directly into your content. You present an interstitial view modally or as part of a transition from one page of content to another. For example, you might use this type of view 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:
The MPMoviePlayerController class supports playback of video content using AirPlay; see AirPlay Video Support.
The MPMovieAccessLog, MPMovieErrorLog, MPMovieAccessLogEvent, and MPMovieErrorLogEvent classes allow you to track network playback statistics.
The MPMoviePlayerController class now includes properties for accessing log information.
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.
NextPrevious
© 2011 Apple Inc. All Rights Reserved. (Last updated: 2011-01-06)
