iOS: Keep application running in background

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When an iOS application goes to the background, are lengthy tasks paused?

iOS Application Background Downloading

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Enjoy Coding :)

Yes, no need to jailbreak. Check out the "Implementing long-running background tasks" section of this doc from Apple.

From Apple's doc: Declaring Your App’s Supported Background Tasks

Support for some types of background execution must be declared in advance by the app that uses them. An app declares support for a service using its Info.plist file. Add the UIBackgroundModes key to your Info.plist file and set its value to an array containing one or more of the following strings: (see Apple's doc from link mentioned above.)