Strange Behaviour of Selected UITableViewCell in iOS7 - ios

Question

I am porting my application to iOS 7 and having some strange behaviour with my tableViews. When I select a cell, the separators disappear for no apparent reason. Not only that, but the background image for the selected state also shifts about 1 pixel upward, even though its frame does not indicate this. I have none of these issues with iOS 6 or older operating systems.
I define my table view the following way:
statisticsTableView = [[UITableView alloc] initWithFrame:CGRectMake(170.0f, 0.0f, 150.0f, window.size.height) style:UITableViewStylePlain];
statisticsTableView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"background.png"]];
statisticsTableView.separatorColor = [UIColor darkGrayColor];
//statisticsTableView.separatorInset = UIEdgeInsetsZero; // <- Makes app crash in iOS6 or older
statisticsTableView.showsHorizontalScrollIndicator = NO;
statisticsTableView.delegate = self;
statisticsTableView.dataSource = self;
The cell is sub-classed and the relevant parts are the following (both regular and selected bacground images are the exact same size and appear correct in iOS6 or older, it is only iOS 7 where the selected BG image appears slightly higher):
UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 70.0f)];
backgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"cell_background_corp.png"]];
self.backgroundView = backgroundView;
UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 70.0f)];
backgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"cell_background_corp_selected.png"]];
self.selectedBackgroundView = backgroundView;
Now, I do know that other people had already asked this question (or, at least part of it), but none of the answers there worked for me. For further reference, I tried these "solutions" and they did NOT work:
Putting this into my didSelectrowAtIndexPath made my cells deselect.
But, I need my selected cell to stay selected, and besides
it looked really awkward with the blinking as swithces between states:
[self.tableView deselectRowAtIndexPath:indexPath animated:NO];
[self.tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
The other one:
Putting this into the heightForRowAtIndexPath delegate method
as a return value did absolutely nothing:
ceilf(rowHeight);
And finally:
This was my attempt to fix the background image position bug. I modified
the way I added the selected background view in the subclassed tableView cell,
but it did not do squat:
UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 70.0f)];
if (iOSVersion >= 7.0f)
{
backgroundView.frame = CGRectMake(0.0f, 1.0f, 150.0f, 70.0f);
}
backgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"cell_background_corp_selected.png"]];
self.selectedBackgroundView = backgroundView;

Answer 1

I had a similar problem and what fixed it for me was to override layoutSubviews in the UITableViewCell subclass like this:
- (void)layoutSubviews
{
[super layoutSubviews];
self.selectedBackgroundView.frame = self.backgroundView.frame;
}
The important thing is to have the [super layoutSubviews]call first.
By the way, I think the default behavior is intended in iOS7. If you look at the Apple Mail app, you see that the separator line also disappears when selecting a cell and that the active background is drawn where the separator line used to be.