iOS 7: Custom container view controller and content inset

Question

I have a table view controller wrapped in a navigation controller. The navigation controller seems to automatically apply the correct content inset to the table view controller

Answer 1

UINavigationController calls undocumented method _updateScrollViewFromViewController:toViewController in transition between controllers to update content insets. Here is my solution:

UINavigationController+ContentInset.h

#import 
@interface UINavigationController (ContentInset)
- (void) updateScrollViewFromViewController:(UIViewController*) from toViewController:(UIViewController*) to;
@end

UINavigationController+ContentInset.m

#import "UINavigationController+ContentInset.h"
@interface UINavigationController()
- (void) _updateScrollViewFromViewController:(UIViewController*) from toViewController:(UIViewController*) to;
@end

@implementation UINavigationController (ContentInset)
- (void) updateScrollViewFromViewController:(UIViewController*) from toViewController:(UIViewController*) to {
    if ([UINavigationController instancesRespondToSelector:@selector(_updateScrollViewFromViewController:toViewController:)])
        [self _updateScrollViewFromViewController:from toViewController:to];
}
@end

Call updateScrollViewFromViewController:toViewController somewhere in your custom container view controller

[self addChildViewController:newContentViewController];
[self transitionFromViewController:previewsContentViewController
                  toViewController:newContentViewController
                          duration:0.5f
                           options:0
                        animations:^{
                            [self.navigationController updateScrollViewFromViewController:self toViewController:newContentViewController];

                    }
                    completion:^(BOOL finished) {
                        [newContentViewController didMoveToParentViewController:self];
                    }];