UITableView Not Scrolling With UISearchBar

Question

What I want to achieve is a UISearchBar that moves up and covers the UINavBar, and contains a cancel button on the right of it. All goes well, until I use the following line of code:

searchDC = [[[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self] autorelease];

What ends up happening is the UITableView just won't scroll, but everything else functions as expected. If I remove that line, my nav bar is visible, and the search bar just sits below it, also lacking a cancel button.

Any ideas?

EDIT:

The code for drawing the search bar is:

self.navigationItem.title = @"Search";
searchBar = [[[UISearchBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, self.view.bounds.size.width, 44.0f)] autorelease];
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
searchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
searchBar.keyboardType = UIKeyboardTypeAlphabet;
searchBar.delegate = self;
[searchBar becomeFirstResponder];

tableView.tableHeaderView = searchBar;
tableView.tableHeaderView.frame = CGRectMake(0.f, 0.f, 480.f, 44.f);
searchDC = [[[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self] autorelease];
searchDC.searchResultsDataSource = self;
searchDC.searchResultsDelegate = self;
searchDC.searchResultsTableView.separatorStyle = UITableViewCellSeparatorStyleNone;
searchDC.searchResultsTableView.scrollEnabled = YES;

overlayView.frame = CGRectMake(0, 50, 320, 480);
[self.view addSubview:overlayView];
[self.view bringSubviewToFront:overlayView];

Answer 1

Not enough information to answer this. You need to show the UIViewController or UINavigation Controller code (both the .h and .m) where you are setting up the UISearchDisplayController.

EDIT:

You're implementing this totally wrongly. Apple has a great example on how to implement this http://developer.apple.com/iphone/library/samplecode/TableSearch/Introduction/Intro.html