title: Call self.viewDidAppear when App comes to foreground
body: <p>I would like to have my app call viewDidAppear again when the user brings the app to  the foreground.</p>
  
  <pre><code>- (void)appReturnsActive{
  
      //THIS IS THE BIT THAT DOESNT WORK, BUT [self.viewDidLoad] DOES WORK
      [self.viewDidAppear];
  }
  </code></pre>
  
  <p>I am creating appReturnsActive in my viewDidAppear method like this. It works well:</p>
  
  <pre><code>[[NSNotificationCenter defaultCenter] addObserver:self 
  selector:@selector(appReturnsActive) name:UIApplicationDidBecomeActiveNotification 
  object:nil];
  </code></pre>
  
  <p>I can do self.viewDidLoad, but I can't choose viewDidAppear. Does anyone know how I might get this to work?</p>
  
  <p>Thank you!!</p>