title: Is it possible to open running background app on in Objective c
body: <p>open my app from background running on a specific timing.. </p>
  
  <p>want to do somthing like this</p>
  
  <pre><code> - (void)applicationDidEnterBackground:(UIApplication *)application
  {
    timer = [NSTimer scheduledTimerWithTimeInterval:10
                                                        target:self
                                                      selector:@selector(timerFired:)
                                                      userInfo:nil
                                                       repeats:NO];
  }
  
  - (void)timerFired:(NSTimer*)timer
  {
  
  NSLog( @"yes it is running...");
  PickUpCallViewController  *call=[[PickUpCallViewController alloc]initWithNibName:@"PickUpCallViewController" bundle:nil];
  
  navi=[[UINavigationController alloc]initWithRootViewController:call];
  [[navi navigationController] setNavigationBarHidden:YES animated:YES];
  window.rootViewController = navi;
  
  [window makeKeyAndVisible];
  }
  </code></pre>