iOS7 UIRefreshControl changes contentInset

Question

I have a UINavigationController in my app. The UINavigationBar is set to opaque and all the scroll views do not overlap underneath the bar.

In one view I have a UITableView. The frame of the UITableView is (0 0; 320 504) on my iPhone 5. i.e. the height is 568 - 64 (the height of the nav bar and status bar).

The contentInset of the UITableView is (0, 0, 0, 0). When the table view first loads the contentOffset is (0, 0).

This is fine. Works brilliantly.

I added a UIRefreshControl to the table view. This works a couple of times but then after a few times of doing pull to refresh then the content at the top gets "stuck" under the nav bar.

When this happens I inspect the contentInset and it is now (-60, 0, 0, 0).

Is there any way to stop the UIRefreshControl from changing the contentInset?

Answer 1

You need override setContentInset: in you UICollectionView

- (void)setContentInset:(UIEdgeInsets)contentInset {
  if (self.tracking) {
    CGFloat difference = contentInset.top - self.contentInset.top;
    CGPoint translation = [self.panGestureRecognizer translationInView:self];
    translation.y -= difference * 3.0 / 2.0;
    [self.panGestureRecognizer setTranslation:translation inView:self];
  }
  [super setContentInset:contentInset];
}

Answer 2

Reset your table view contentInset.

-(void)pullToRefresh
{
    [self.tableView reloadData];
    [self.refreshControl endRefreshing];
    [self.tableView setContentInset:UIEdgeInsetsMake(0, 0, 0, 0)];
}