User Interface Changes

• UI Redesign

– iOS 7 Design Resources

• Dynamic Behaviors for Views

– apps can now specify dynamic behaviors for UIView objects and for other objects that conform to the UIDynamicItem protocol.

• Text Kit

– Text programming guide

64-Bit Support – when compiled for the 64-bit runtime, apps may run faster because of the availability of extra processor resources in 64-bit mode.

Multitasking Enhancements – apps can register with the system and be launched periodically to retrieve that content in the background; apps that use push notifications to notify the user that new content is available can fetch the content in the background.

Games

• Sprite Kit Framework

– provides a hardware-accelerated animation system optimized for creating 2D and 2.5D games

• Game Controller Framework

– lets you discover and configure Made-for-iPhone/iPod/iPad (MFi) game controller hardware in your app. Game controllers can be devices connected physically to an iOS device or connected wirelessly over Bluetooth

• Game Center Improvements

Maps – overlays, 3D map support, geodesic lines, map snapshots, direction related route information

AirDrop – AirDrop support is now built in to the existing UIActivityViewController class.

Inter-App Audio – enables the ability to send MIDI commands and stream audio between apps

Peer-to-Peer Connectivity – supports the discovery of nearby devices and the direct communication with those devices

New Frameworks

• GameController.framework
• SpriteKit.framework
• MultipeerConnectivity.framework
• JavaScriptCore.framework
• MediaAccessibility.framework
• SafariServices.framework

– provides support for programmatically adding URLs to the user’s Safari reading list

Enhancements to Existing Frameworks

• In the Message UI framework, the MFMessageComposeViewController class adds support for attaching files to messages.
• The iAd framework introduces new methods on the MPMoviePlayerController class that let you run ads before a movie.
• The framework extends the UIViewController class to make it easier to create ad-supported content. You can now configure your view controllers to display ads before displaying the actual content they manage.
• The NSData class adds support for Base64 encoding.
• The NSProgress class provides a general-purpose way to monitor the progress of an operation and report that progress to other parts of your app that want to use it.
• The Core Telephony framework (CoreTelephony.framework) lets you get information about the type of radio technology in use by the device.
• The Core Motion framework (CoreMotion.framework) adds support for step counting and motion tracking.
• The Core Foundation framework (CoreFoundation.framework) now lets you schedule stream objects on dispatch queues.

Objective-C – has been enhanced to support modules.

Full description is in Apple iOS Developer Library.