Changes

== An Overview of Background Fetch ==

Background fetch is a new feature introduced with the iOS 7 SDK that provides a way for an application to be woken up in the background to perform content updates. A news application, for example, might benefit from being given opportunities to download new articles in the background so that the next time the user launches the application it is already populated with the latest news headlines and articles. The frequency of background fetch operations can be configured by the application by specifying a time interval, or left at the discretion of the operating system. When the background fetch schedule is left at the discretion of iOS, the operating system will learn the user’s pattern of application use and schedule fetch operations so that they occur before those times. If iOS notices, for example, that the application is launched at lunch time each weekday, fetch opportunities will be provided for the application prior to that time.