iphone - 灰色 UISearchBar 以编程方式匹配范围栏

Question

我正在尝试重新创建此 UISearchBar(如表搜索示例代码中所示):

alt text http://img168.imageshack.us/img168/6378/43558113.png

我见过的所有执行此操作的示例都涉及使用 xib，但是我需要以编程方式执行此操作。问题是更改色调颜色也会更改取消按钮的色调:

alt text http://img243.imageshack.us/img243/1375/screenshot20100527at944.png

有什么想法吗？

Answer 1

将搜索栏与 UISearchDisplayController 关联起来可以神奇地提供许多标准外观和行为，例如:

• 灰色调不影响取消按钮
• 自动显示/隐藏取消按钮
• 调整任何表格 View 索引的宽度

在我的表格 View Controller 中，我完成了以下操作:

- (void)viewDidLoad {
    [super viewDidLoad];

    // setup searchBar and searchDisplayController

    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectZero];
    [searchBar sizeToFit];
    searchBar.delegate = self;
    searchBar.placeholder = @"Search";
    self.tableView.tableHeaderView = searchBar;

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

    // The above assigns self.searchDisplayController, but without retaining.
    // Force the read-only property to be set and retained. 
    [self performSelector:@selector(setSearchDisplayController:) withObject:searchDC];

    searchDC.delegate = self;
    searchDC.searchResultsDataSource = self;
    searchDC.searchResultsDelegate = self;

    [searchBar release];
    [searchDC release];
}