我有一个UISearchBar作为子视图添加到UICollectionView,并附加到UISearchDisplayController.
我在viewDidLoad中设置它：
self.searchController = [[UISearchDisplayController alloc] initWithSearchBar:self.searchBar
contentsController:self];
self.searchController.delegate = self;
self.searchController.searchResultsDataSource = self;
self.searchController.searchResultsDelegate = self;
[self.collectionView addSubview:self.searchBar];
当我将另一个视图控制器推送到导航控制器然后弹出它时,搜索栏消失.仅当集合视图向下滚动到足以隐藏搜索栏时才会发生这种情况.此外,即使搜索栏消失,点击它应该激活的白色空间也会激活附加到它的搜索显示控制器.
这仅在iOS 7上发生,如果我删除搜索显示控制器,搜索栏将不会消失.
还有一件事值得一提.当搜索栏消失时,如果我按下另一个视图控制器然后弹出它,则该栏将再次可见.
显然这是iOS 7上UISearchDisplayController的一个bug,所以关于如何解决它的任何想法？
解决方法
我最终自己实现了UISearchDisplayController.这是我的代码.
ZBNSearchDisplayController.h
@protocol ZBNSearchDisplayDelegate; @interface ZBNSearchDisplayController : NSObject<UISearchBarDelegate> - (id)initWithSearchBar:(UISearchBar *)searchBar contentsController:(UIViewController *)viewController; - (void)setActive:(BOOL)visible animated:(BOOL)animated; @property(nonatomic,assign) id<ZBNSearchDisplayDelegate> delegate; @property(nonatomic,getter = isActive) BOOL active; @property(nonatomic,readonly) UISearchBar *searchBar; @property(nonatomic,readonly) UIViewController *searchContentsController; @property(nonatomic,readonly) UITableView *searchResultsTableView; @property(nonatomic,assign) id<UITableViewDataSource> searchResultsDataSource; @property(nonatomic,assign) id<UITableViewDelegate> searchResultsDelegate; @end @protocol ZBNSearchDisplayDelegate <NSObject> @optional - (void)searchDisplayControllerWillBeginSearch:(ZBNSearchDisplayController *)controller; - (void)searchDisplayControllerDidBeginSearch:(ZBNSearchDisplayController *)controller; - (void)searchDisplayControllerWillEndSearch:(ZBNSearchDisplayController *)controller; - (void)searchDisplayControllerDidEndSearch:(ZBNSearchDisplayController *)controller; - (void)textDidChange:(NSString *)searchText; - (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope; @end
ZBNSearchDisplayController.m
#import "ZBNSearchDisplayController.h"
@implementation ZBNSearchDisplayController
- (id)initWithSearchBar:(UISearchBar *)searchBar contentsController:(UIViewController *)viewController {
self = [super init];
if (self) {
_searchBar = searchBar;
_searchBar.delegate = self;
_searchContentsController = viewController;
CGFloat y = 64.0f;
CGFloat height = _searchContentsController.view.frame.size.height - y;
_searchResultsTableView = [[UITableView alloc] initWithFrame:CGRectMake(0.0f,y,_searchContentsController.view.frame.size.width,height)];
_searchResultsTableView.scrollsToTop = NO;
}
return self;
}
- (void)setSearchResultsDataSource:(id<UITableViewDataSource>)searchResultsDataSource {
_searchResultsTableView.dataSource = searchResultsDataSource;
}
- (void)setSearchResultsDelegate:(id<UITableViewDelegate>)searchResultsDelegate {
_searchResultsTableView.delegate = searchResultsDelegate;
}
- (void)setActive:(BOOL)visible animated:(BOOL)animated {
if (!visible) {
[_searchBar resignFirstResponder];
_searchBar.text = nil;
_searchBar.showsCancelButton = NO;
}
if (visible && [self.delegate respondsToSelector:@selector(searchDisplayControllerWillBeginSearch:)]) {
[self.delegate searchDisplayControllerWillBeginSearch:self];
} else if (!visible && [self.delegate respondsToSelector:@selector(searchDisplayControllerWillEndSearch:)]) {
[self.delegate searchDisplayControllerWillEndSearch:self];
}
[_searchContentsController.navigationController setNavigationBarHidden:visible animated:YES];
float alpha = 0;
if (visible) {
[_searchContentsController.view addSubview:_searchResultsTableView];
alpha = 1.0;
}
if ([_searchContentsController.view respondsToSelector:@selector(scrollEnabled)]) {
((UIScrollView *)_searchContentsController.view).scrollEnabled = !visible;
}
if (animated) {
[UIView animateWithDuration:0.2 animations:^{
_searchResultsTableView.alpha = alpha;
} completion:^(BOOL finished) {
self.active = visible;
}];
} else {
_searchResultsTableView.alpha = alpha;
}
}
#pragma mark - UISearchBarDelegate
- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {
if ([self.delegate respondsToSelector:@selector(searchBar:selectedScopeButtonIndexDidChange:)]) {
[self.delegate searchBar:searchBar selectedScopeButtonIndexDidChange:selectedScope];
}
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
if ([self.delegate respondsToSelector:@selector(textDidChange:)]) {
[self.delegate textDidChange:searchText];
}
}
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
[searchBar setShowsCancelButton:YES animated:YES];
[self setActive:YES animated:YES];
[_searchResultsTableView reloadData];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
[_searchResultsTableView reloadData];
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
[self setActive:NO animated:YES];
[self.searchResultsTableView scrollRectToVisible:CGRectMake(0,1,1) animated:NO];
}
@end
