我也有同样的问题。搜索栏仍然存在并且可以接收触摸事件。但是它没有被渲染。我相信问题出在 UISearchDisplaycontroller 中，因为如果我不使用 UISearchDisplayController，它会呈现得很好。我最终编写了一个自定义 SearchDisplaycontroller 来替换它。这是非常基本的，只做我需要的。
使用它的方式与普通 UISearchDisplayController 相同，但 self.searchDisplayController 不会返回任何内容。您将不得不使用另一个指针来引用自定义搜索显示控制器。
看起来像一个大而丑陋的工作，但唯一一个对我有用。渴望听到替代方案。
@protocol SearchDisplayDelegate;
@interface SearchDisplayController : NSObject<UISearchBarDelegate>
- (id)initWithSearchBar:(UISearchBar *)searchBar contentsController:(UIViewController *)viewController;
@property(nonatomic,assign) id<SearchDisplayDelegate> delegate;
@property(nonatomic,getter=isActive) BOOL active; // configure the view controller for searching. default is NO. animated is NO
- (void)setActive:(BOOL)visible animated:(BOOL)animated; // animate the view controller for searching
@property(nonatomic,readonly) UISearchBar *searchBar;
@property(nonatomic,readonly) UIViewController *searchContentsController; // the view we are searching (often a UITableViewController)
@property(nonatomic,readonly) UITableView *searchResultsTableView; // will return non-nil. create if requested
@property(nonatomic,assign) id<UITableViewDataSource> searchResultsDataSource; // default is nil. delegate can provide
@property(nonatomic,assign) id<UITableViewDelegate> searchResultsDelegate;
@end
@protocol SearchDisplayDelegate <NSObject>
// implement the protocols you need
@optional
@end
实现
@implementation SearchDisplayController {
UISearchBar *_searchBar;
UIViewController *_viewController;
UITableView *_searchResultsTableView;
UIView *_overLay;
}
- (void)dealloc {
[_searchBar release];
[_searchResultsTableView release];
[_overLay release];
[super dealloc];
}
- (UIViewController *)searchContentsController {
return _viewController;
}
- (UITableView *)searchResultsTableView {
return _searchResultsTableView;
}
- (id)initWithSearchBar:(UISearchBar *)searchBar contentsController:(UIViewController *)viewController {
self = [super init];
if (self) {
_searchBar = [searchBar retain];
_searchBar.delegate = self;
_viewController = viewController;
_searchResultsTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, CGRectGetMaxY(_searchBar.frame), _viewController.view.frame.size.width, _viewController.view.frame.size.height - CGRectGetMaxY(_searchBar.frame))];
_overLay = [[UIView alloc]initWithFrame:_searchResultsTableView.frame];
_overLay.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(overLayTapped)];
[_overLay addGestureRecognizer:tap];
[tap release];
}
return self;
}
- (void)setSearchResultsDataSource:(id<UITableViewDataSource>)searchResultsDataSource {
_searchResultsTableView.dataSource = searchResultsDataSource;
}
- (void)setSearchResultsDelegate:(id<UITableViewDelegate>)searchResultsDelegate {
_searchResultsTableView.delegate = searchResultsDelegate;
}
- (void)overLayTapped {
[self setActive:NO animated:YES];
[_searchBar resignFirstResponder];
_searchBar.text = nil;
_searchBar.showsCancelButton = NO;
}
- (void)setActive:(BOOL)visible animated:(BOOL)animated {
UIView *viewToAdd = nil;
if (!_searchBar.text.length) {
viewToAdd = _overLay;
} else {
viewToAdd = _searchResultsTableView;
}
float a = 0;
if (visible) {
[_viewController.view addSubview:viewToAdd];
a = 1.0;
}
if ([_viewController.view respondsToSelector:@selectore(scrollEnabled)]) {
((UIScrollView *)_viewController.view).scrollEnabled = !visible;
}
if (animated) {
[UIView animateWithDuration:0.2 animations:^{
_overLay.alpha = a;
_searchResultsTableView.alpha = a;
}];
} else {
_overLay.alpha = a;
_searchResultsTableView.alpha = a;
}
}
- (void)setActive:(BOOL)active {
[self setActive:active animated:YES];
}
#pragma mark - UISearchBar delegate protocols
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
[self setActive:YES animated:YES];
searchBar.showsCancelButton = YES;
[_searchResultsTableView reloadData];
}
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar {
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
[_searchResultsTableView reloadData];
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
[self overLayTapped];
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
if (searchText.length) {
[_overLay removeFromSuperview];
[_viewController.view addSubview:_searchResultsTableView];
} else {
[_searchResultsTableView removeFromSuperview];
[_viewController.view addSubview:_overLay];
}
[_searchResultsTableView reloadData];
}
@end
更新：关于如何以编程方式使用它
声明一个 ivar
SearchDisplayController *mySearchDisplayController;
以编程方式初始化它
mySearchDisplayController = [[SearchDisplayController alloc]initWithSearchBar:mySearchBar contentsController:self];
将搜索栏添加到您的表格视图
self.tableView.headerView = mySearchBar;
使用 mySearchDisplayController 作为对 custon 类的引用，而不是 self.searchDisplayController。