Question

I am experiencing an extra gap between TTableTextItems in a TTSectionedDataSource under iOS5, the same code is not showing the extra space under iOS4.You can see it in image below.
, left side is IOS 4.3 and right side is iOS5.

My TTTableViewController code is:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        self.variableHeightRows = NO;
        self.tableViewStyle = UITableViewStyleGrouped;
        self.autoresizesForKeyboard = YES;
    }
    return self;
}

- (void) createModel {
    self.dataSource = [[[NewDataSource alloc] init] autorelease];
}

- (id<UITableViewDelegate>)createDelegate {
    return [[[NewTableDelegate alloc] initWithController:self] autorelease];
}

The TTTableViewDelegate code is:

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
    if (section == 0) {
        return 70   ;
    }
    return 200;
}

And my TTSectionedDataSource:

- (void) tableViewDidLoadModel:(UITableView *)tableView {
    [super tableViewDidLoadModel:tableView];
    [self.sections addObject:@"Section 1"];
    [self.items addObject:[NSArray arrayWithObject:[TTTableTextItem itemWithText:@"TTTableTextItem1" URL:@""]]];
    [self.sections addObject:@"Section 2"];
    [self.items addObject:[NSArray arrayWithObject:[TTTableTextItem itemWithText:@"TTTableTextItem 2" URL:@""]]];
}

The problem is happening because the method - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section in the TTTableViewDelegate gets called 2 times (with values 1 and 0) under iOS4 and it gets called 4 times (values 1,1,0 and 0) under iOS5 this is why I can see the extra gap between TTTableTextItems.

Any ideas of why this is happening and how to prevent it?

Answer 1

The problem is related with the new behaviour of - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section under iOS5.

From Apple documentation:

Prior to iOS 5.0, table views would automatically resize the heights of footers to 0 for sections where tableView:viewForFooterInSection: returned a nil view. In iOS 5.0 and later, you must return the actual height for each section footer in this method.