Create amazing cloud-connected, native apps using JavaScript.

The Core Location framework lets you determine the current location or heading associated with a device. The framework uses the available hardware to determine the user’s position and heading. You use the classes and protocols in this framework to configure and schedule the delivery of location and heading events. You can also use it to define geographic regions and monitor when the user crosses the boundaries of those regions. In iOS, you can also define a region around a Bluetooth beacon.

The Google data APIs provide a simple protocol for reading and writing data on the web. Many Google services provide a Google data API. This library is for Google XML APIs. For JSON APIs, use the Google APIs Client Library for Objective-C. Each of the following Google services provides a Google Data API supported by this library: Contacts Picasa Web Albums Spreadsheets Webmaster Tools

The Media Player framework provides facilities for playing movie, music, audio podcast, and audio book files. This framework also gives your application access to the iPod library, letting you find and play audio-based media items synced from iTunes on the desktop. iPod library access is read-only.

The UIKit framework (UIKit.framework) provides the crucial infrastructure needed to construct and manage iOS apps. This framework provides the window and view architecture needed to manage an app’s user interface, the event handling infrastructure needed to respond to user input, and the app model needed to drive the main run loop and interact with the system.

Display web content in windows. Implement browser features such as following user-activated links, managing a back-forward list, and managing a history of recently visited pages. WebKit provides a set of classes to display web content in windows, and implements browser features such as following links when clicked by the user, managing a back-forward list, and managing a history of pages recently visited. WebKit greatly simplifies the complicated process of loading webpages—that is, asynchronously requesting web content from an HTTP server where the response may arrive incrementally, in random order, or partially due to network errors. WebKit also simplifies the process of displaying that content which can contain various MIME types, and compound frame elements each with their own set of scroll bars. WebCore is a framework developed by Apple, and licence under the LGPL, to provide an HTML layout engine for Mac OS X. It is one half of WebKit (the other being JavaScriptCore). WebCore combines the open source KHTML layout engine developed by the KDE project, with an adapter library called KWQ (pronounced Quack). Apple created the KWQ adapter to replace KHTML's dependency on code from the Qt toolkit and other KDE modules. KWQ also presents an Objective-C application programming interface to the C++-based KHTML rendering engine, allowing it to easily be referenced by Cocoa-based applications.