Use UISearchBar & UISearchDisplayController

Use UISearchBar & UISearchDisplayController.m

UISearchBar *searchBar = [[[UISearchBar alloc] initWithFrame:CGRectZero] autorelease];
[searchBar sizeToFit];
self.tableView.tableHeaderView = searchBar;

[[[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self] autorelease];
self.searchDisplayController.delegate = self;
self.searchDisplayController.searchResultsDataSource = self;
self.searchDisplayController.searchResultsDelegate = self;