Background task when apns received

Question

After reading APNS documentation, I have implemented apns into my app. Everything works fine, but I have a question. I don\'t know if it is possible, but I would like to do

Answer 1

Source from Apple Documentation:

          -(void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
      fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{


          }

Unlike the application:didReceiveRemoteNotification: method, which is called only when your app is running, the system calls this method regardless of the state of your app. If your app is suspended or not running, the system wakes up or launches your app and puts it into the background running state before calling the method.

When this method is called, your app has up to 30 seconds of wall-clock time to perform the download operation and call the specified completion handler block. In practice, your app should call the handler block as soon as possible after downloading the needed data. If you do not call the handler in time, your app is suspended. More importantly, the system uses the elapsed time to calculate power usage and data costs for your app’s background downloads. For more information about supporting background operations in response to push notifications, see “App States and Multitasking” in iOS App Programming Guide.

Tom updates: However, the system does not automatically launch your app if the user has force-quit it. In that situation, the user must relaunch your app or restart the device before the system attempts to launch your app automatically again.