Content pushed down in a UIPageViewController with UINavigationController

Question

UPDATE 2

I've been running and testing my app in the iOS Simulator using a 4-inch device. If I run using a 3.5-inch device the label doesn't jump. In my .xib, under Simulated Metrics, I have it set as Retina 4-inch Full Screen. Any idea why I'm only seeing this problem on a 4-inch device?

UPDATE 1

In IB, if I choose "Navigation Bar" in Simulated Metrics, my label still jumps. The only way I can get my label to render correctly on the first screen is to not set a navigation controller as my window's root view controller.

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My window's rootViewController is being set to a UINavigationController whose rootViewController has a UIPageViewController embedded.

When my app loads, the initial view is presented with it's content pushed down a bit, roughly the same size as a navigation bar. When I scroll the pageViewController, the content jumps up to where it was placed in the nib, and all other viewControllers loaded by the pageViewController are fine.

In my appDelegate:

self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[ContainerViewController new]]; 

In ContainerViewController:

- (void)viewDidLoad {      [super viewDidLoad];      self.pvc = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll                                                navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal                                                              options:nil];     self.pvc.dataSource = self;     self.pvc.delegate = self;     DetailViewController *detail = [DetailViewController new];     [self.pvc setViewControllers:@[detail]                        direction:UIPageViewControllerNavigationDirectionForward                         animated:false                       completion:nil];      [self addChildViewController:self.pvc];     [self.view addSubview:self.pvc.view];     [self.pvc didMoveToParentViewController:self]; } 

Answer 1

So I'm adding another answer after further development and I finally think I figured out what's going on. Seems as though in iOS7, UIPageViewController has its own UIScrollView. Because of this, you have to set automaticallyAdjustsScrollViewInsets to false. Here's my viewDidLoad now:

- (void)viewDidLoad {     [super viewDidLoad];      self.automaticallyAdjustsScrollViewInsets = false;      DetailViewController *detail = [[DetailViewController alloc] init];     [self setViewControllers:@[detail]                    direction:UIPageViewControllerNavigationDirectionForward                     animated:false                   completion:nil]; } 

No need to put anything in viewWillLayoutSubviews (as one of my previous answers suggested).