保持NSTimer活在iOS 7的背景
问题说明
我创建了在后台运行NSTimer的应用程序。我使用位置管理器在后台运行NSTimer，
I have created Application which runs NSTimer in Background. I used the Location manager to run the NSTimer in background,
我在下面使用链接在后台运行NSTimer，
I used below link to run NSTimer in background,
这种方法在iOS 6中可以正常工作， iOS 7.我的应用程序崩溃一段时间后的应用程序在iOS 7的后台。
This approach works fine in iOS 6 but not works on iOS 7. My Application crashes after some time while Application in background on iOS 7.
请让我知道如果任何不同的方法在后台运行NSTimer 。
Please let me know if any different approach to run the NSTimer in background.
提前感谢。
正确答案
，存在用于周期性数据提取的新模式。将 fetch 后台模式添加到您的应用程序，并在您的应用程序委托中传递一个间隔到 - [UIApplication setMinimumBackgroundFetchInterval： 。
In iOS7, there is a new mode for periodic data fetch. Add the fetch background mode to your app, and in your application delegate, pass an interval to - [UIApplication setMinimumBackgroundFetchInterval:. Your app's delegate will start receiving calls to application:performFetchWithCompletionHandler: once the app is in the background.
更多信息，您的应用程序代理将开始接收对应用程序：performFetchWithCompletionHandler：这里：
https://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:performFetchWithCompletionHandler ：
More information here: https://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:performFetchWithCompletionHandler:
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