the popViewController could not pop the root right view controller

[flypigz]

the popViewController method re-use the popViewControllerToViewControl, which lead to this limitation, it does not support pop all of the right view controllers....

instead, i think the popViewControllerToViewControl should re-use code of popViewController method..

• (void)popViewController:(UIViewController *)viewController animated:(BOOL)animated {
  NSLog(@"%s", PRETTY_FUNCTION);
  if (![self.viewControllers containsObject:viewController]) {
  NSLog(@"viewController (%@) is not part of the viewController Hierarchy", viewController);
  return;
  }

  // this method re-use the _popViewControllersToViewController, which require at least
  // one left size view controller to specify the location to pop, so it does not
  // support poping the root right view controller

  NSInteger index = [self.viewControllers indexOfObject:viewController]-1; // why

  NSLog(@"index: %d", index); ===> if the root right viewcontroller is passed as parameter, the index is -1 here...

  if (index >= 0) {
  viewController = [self.viewControllers objectAtIndex:index];
  [self _popViewControllersToViewController:viewController animated:animated];
  }
  }