导航栏不会显示在iOS 9.2中

Question

我对UIsearchBarController没什么问题。当我点击时 搜索栏在导航栏上始终显示白色。我想要那里的导航栏。

- (void)viewDidLoad {
   [super viewDidLoad];

  if ([self respondsToSelector:@selector(setEdgesForExtendedLayout:)])
   {
    [self setEdgesForExtendedLayout:UIRectEdgeNone];
   }
 }

 -(void)viewDidAppear:(BOOL)animated
  {
   [self addSearching];
  }


-(void)addSearching
 {
   searchResultsController = [[UITableViewController alloc] init];
   searchResultsController.tableView.delegate = self;
   searchResultsController.tableView.dataSource = self;
   searchResultsController.tableView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
   searchResultsController.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
   searchResultsController.tableView.delegate = self;

   searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
   searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;

   searchController.delegate = self;
   searchController.searchResultsUpdater = self;
   searchController.searchBar.delegate = self; // so we can monitor text changes + others

   searchController.searchBar.placeholder = @"Search Members";
   [searchController.searchBar sizeToFit];


   //self.definesPresentationContext = YES;  // know where you want UISearchController to be displayed

   self.memberTableView.tableHeaderView = searchController.searchBar;
}

输出是：