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

I've had a similar problem. So on iOS 7, there is a new property on UIViewController called automaticallyAdjustsScrollViewInsets. By default, this is set to YES. When your view hierarchy is in any way more complicated than a scroll/table view inside a navigation or tab bar controller, this property didn't seem to work for me.

What I did was this: I created a base view controller class that all my other view controllers inherit from. That view controller then takes care of explicitly setting the insets:

Header:

#import 

@interface SPWKBaseCollectionViewController : UICollectionViewController

@end

Implementation:

#import "SPWKBaseCollectionViewController.h"

@implementation SPWKBaseCollectionViewController


- (void)viewDidLoad
{
    [super viewDidLoad];

    [self updateContentInsetsForInterfaceOrientation:self.interfaceOrientation];
}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [self updateContentInsetsForInterfaceOrientation:toInterfaceOrientation];

    [super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
}

- (void)updateContentInsetsForInterfaceOrientation:(UIInterfaceOrientation)orientation
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
        UIEdgeInsets insets;

        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
            insets = UIEdgeInsetsMake(64, 0, 56, 0);
        } else if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
            if (UIInterfaceOrientationIsPortrait(orientation)) {
                insets = UIEdgeInsetsMake(64, 0, 49, 0);
            } else {
                insets = UIEdgeInsetsMake(52, 0, 49, 0);
            }
        }

        self.collectionView.contentInset = insets;
        self.collectionView.scrollIndicatorInsets = insets;
    }
}

@end

This also works for web views:

self.webView.scrollView.contentInset = insets;
self.webView.scrollView.scrollIndicatorInsets = insets;

If there is a more elegant and yet reliable way to do this, please let me know! The hardcoded inset values smell pretty bad, but I don't really see another way when you want to keep iOS 5 compatibility.