title: Forced orientation change does not work sometimes
body: <p>When a certain button is pressed in my app, the view should change orientation from portrait to
  landscape. When the user comes back, the view controller should change back to portrait. But
  sometimes the orientation doesn't change or the wrong view frame is used.</p>
  
  <p>Here is my code</p>
  
  <pre><code>-(void)btnSignClicked:(CustomSignButton *)btn {
      isSignButtonClicked = true;
      if (NSFoundationVersionNumber &gt; NSFoundationVersionNumber_iOS_7_0) {
          NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight];
          [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
      }
      else
      {
          [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:YES];
      }
      selectedWaiverId = btn.customTag;
  
      SignatureView *obj = [[SignatureView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) delegate:self]; // Most of time got size (568,320) but some time i got (320,568), Don't know why
      [self.view addSubview:obj];
  }
  
  #pragma mark - SIGNATUREVIEW DELEGATE
  -(void)removeSignatureView:(SignatureView *)signatureView {
      isSignButtonClicked = false;
  
      if (NSFoundationVersionNumber &gt; NSFoundationVersionNumber_iOS_7_0)
      {
          NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
          [[UIDevice currentDevice] setValue:value forKey:@"orientation"]; // Some time not changed the orientation are view remaining in landscape 
      }
      else
      {
          [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:YES];
      }
  
      [signatureView removeFromSuperview];
      signatureView = nil;
  
  }
  #pragma mark
  #pragma mark - Rotate screen
  -(UIInterfaceOrientationMask)supportedInterfaceOrientations
  {
      if (isSignButtonClicked == true)
      {
          return UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscape;
      }
      else
      {
          return UIInterfaceOrientationMaskPortrait;
      }
  }
  - (BOOL)shouldAutorotate
  {
      return YES;
  }
  -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  {
      if (isSignButtonClicked == true)
      {
          return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
      }
      else
      {
          return (interfaceOrientation == UIInterfaceOrientationPortrait);
      }
  
  }
  </code></pre>
  
  <p><strong>UPDATE</strong></p>
  
  <p>Sometimes <code>viewWillTransitionToSize</code> method is not called so I also integrate this notification </p>
  
  <pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
  [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
  </code></pre>
  
  <p>But sometimes this also does not work.</p>