iOS7：无法向导航控制器添加搜索栏

Question

在我的SearchViewController.m中，我添加了

- (void)viewDidLoad {
    [super viewDidLoad];

    self.navigationController.navigationBar.barTintColor = [UIColor redColor];
    self.searchDisplayController.displaysSearchBarInNavigationBar = YES;
    [self.searchDisplayController.searchBar setBarTintColor:[UIColor whiteColor]];


    self.searchResultsView.dataSource = self;
    self.searchResultsView.delegate = self;

    NSLog(@"fetching businesses");
    [self fetchBusinesses];

    // fix UITableViewCell height
    self.tableView.rowHeight = 90;
}

但我看不到搜索栏。我只看到了

我错过了什么？

由于

Answer 1

您可以编程方式添加搜索栏，如下所示：

使 UISearchBar 和 UISearchDisplayController 的属性，即。

@property (nonatomic,strong) UISearchBar *searchBar ;
@property (nonatomic,strong) UISearchDisplayController *searchDisplayController;

然后编写以下代码：

- (void)viewDidLoad 
{
     searchBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
        searchBar.delegate =self;
        self.searchBar.showsCancelButton =TRUE;
        [self.searchBar setHidden:NO];
        [self.searchBar becomeFirstResponder];
        [self.searchDisplayController setActive:YES];

        [self.view addSubview:self.searchBar];

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

}

您还需要为同一个ViewController实现 UISearchDisplayDelegate，UISearchBarDelegate 委托

希望此代码适合您。试一试，让我知道您的反馈意见。

Answer 2

现在我找到了答案，我只是在我身边进行了测试，并且在我的最后工作正常，

 // init search bar
    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    searchBar.delegate = self;
    searchBar.showsCancelButton=YES;

    // set up searchDisplayController
    UISearchDisplayController *searchController = [[UISearchDisplayController alloc]
                                                   initWithSearchBar:searchBar contentsController:self];
    searchController.delegate = self;


    self.navigationController.navigationBar.barTintColor = [UIColor redColor];
    self.searchDisplayController.displaysSearchBarInNavigationBar = YES;
    [self.searchDisplayController.searchBar setBarTintColor:[UIColor whiteColor]];