Foreground notification

  [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(allFunctions)

                                                 name:UIApplicationWillEnterForegroundNotification

                                               object:nil];

-(void) allFunctions{ //call any functions that need to be run when application will enter foreground

    NSLog(@"calling all functions...application just came back from foreground");

}