UINavigationController not updating size with auto layout iOS 8 - ios

Question

I'm trying to update my app to be compatible with iOS8 I found some bugs in the App with the Autolayouts of the UINavigationController when I rotate the device to landscape mode the root view updates but the subviews doesn't update even the sub-views of the Scrollview.
The App is for iPhone and iPad so I use two separate storyboards and I use this code
- (void)viewDidLoad {
[super viewDidLoad];
self.shouldAdjustChildViewHeightForStatusBar = NO;
[self setNeedsStatusBarAppearanceUpdate];
UIStoryboard *storyboard;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
} else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
}
self.topViewController = [storyboard instantiateViewControllerWithIdentifier:#"HomeController"];
}
The image
Below is the view as you see is in landscape mode an there is a big white space because the Scrollview did not update or something
I use to update the subview but the scroll did not work.
-(void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator{

Answer 1

It's unclear from your question but it looks like you are subclassing ECSlidingViewController.
If you look at the source for ECSlidingViewController, it only lays out the topViewController in its viewDidLoad.
Solution 1:
You want the topViewController to be set before viewDidLoad is called, and they do it in awakeFromNib:
- (void)awakeFromNib {
[super awakeFromNib];
UIStoryboard *storyboard;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
} else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
}
self.topViewController = [storyboard instantiateViewControllerWithIdentifier:#"HomeController"];
}
Solution 2
They seem to have a nice convenience method to initialize a sliding view controller. Wherever you are creating your ECSlidingViewController, you could rather do:
UIStoryboard *storyboard;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
} else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
}
UIViewController *topViewController = [storyboard instantiateViewControllerWithIdentifier:#"HomeController"];
ECSlidingViewController *slidingViewController = [ECSlidingViewController slidingWithTopViewController:topViewController];
// ...