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];
}
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).