UISearchBar的范围栏未在iOS 7中显示？

Question

I'm creating a UISearchViewController and I wish to put the UISearchBar in the navigation controller's navigation item. Here's how I did it with no results:

self.searchBar = [UISearchBar new];
self.searchBar.showsScopeBar = YES;
self.searchBar.scopeButtonTitles = @[@"Users", @"Hashtags"];
self.searchBar.delegate = self;

self.searchController = [[UISearchDisplayController alloc] initWithSearchBar:self.searchBar contentsController:self];
self.searchController.delegate = self;
self.searchController.searchResultsDataSource = self;
self.searchController.searchResultsDelegate = self;
self.searchController.displaysSearchBarInNavigationBar = YES;

I also tried:

self.searchDisplayController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
self.searchDisplayController.searchBar.scopeButtonTitles = @[@"Users", @"Hashtags"];
self.searchDisplayController.searchBar.showsScopeBar = YES;

Am I missing out anything or doing something wrong here?

Edit: This and this is exactly what I'm aiming for.

Answer 1

Try with following code

UISearchBar* searchBar = [[UISearchBar alloc] initWithFrame:CGRectZero];
searchBar.barStyle = UIBarStyleBlack;
searchBar.scopeButtonTitles = [NSArray arrayWithObjects:@"Users", @"Hashtags", nil];
searchBar.showsScopeBar = YES;
self.searchBar.delegate = self;

Answer 2

The scope bar will only appear when the search bar is active. The search display controller is hiding the search bars scope bar.

If you want the scope bar always available, you'll have to do a little hack work. Maybe one of these will help.

How to have UISearchBar scope bar always visible?

IOS7 : uisearchdisplaycontroller always show scope bar

EDIT:

Have you tried something in this direction? Assuming you have added the search bar to the navigation bar's titleView .

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    CGRect rect = self.navigationItem.titleView.superview.frame;
    rect.size.height = 88.0f;
    self.navigationItem.titleView.superview.frame = rect;
}

Answer 3

尝试调整searchBar框架：-

UISearchBar* searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake:(0,0,320,88)];

Answer 4

I set "Use Auto Layout" from xip inspector -> interface builder

Thats working perfectly with me