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The iOS 5 Developer’s Cookbook: Expanded Electronic Edition: Essentials and Advanced Recipes for iOS Programmers by Erica Sadun

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16. Documents and Data Sharing

Under iOS, applications can share information and data as well as move control from one application to another using a variety of system features. Each application has access to a common system pasteboard that allows copying and pasting across apps. They can open documents from one app in another app that supports that format. They can declare custom URL scheme that can be embedded in text and web pages, and custom preferences that are centralized to the settings app. This chapter introduces the ways you can integrate document, defaults, and data sharing between applications. You’ll see how to integrate these features into your applications and use them smartly to make your app a cooperative citizen of the iOS ecosystem. ...

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