我试图让一个UISearchController在一个UITableViewController中工作.我以编程方式创建所有内容(即无界面构建器).大多数情况下,一切正常工作,除了在搜索时,我无法选择任何表单元格(-tableView：didSelectRowAtIndexPath：从不调用).
但是,我不认为这是一个与代表有关的问题,或者是不被调用的另一个常见原因.在搜索时,包含搜索结果的表视图显示为灰色(即不活动),我相信这是为什么我无法选择任何单元格.
我的想法是,UISearchBar被卡住作为第一响应者,但是我尝试了各种方式来撤销这种状态和/或试图强制表视图成为第一响应者,但是所有这些都有灾难性的结果.
这是我的UITableViewController子类的相关代码：
@interface SearchResultsTableViewController()
@property (copy,nonatomic) NSArray *searchResults;
@property (strong,nonatomic) UISearchController *searchController;
@end
@implementation SearchResultsTableViewController
- (NSArray *)searchResults
{
// Lazy array instantiation
if (!_searchResults)
{
_searchResults = [[NSArray alloc] init];
}
return _searchResults;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self setSearchController:[[UISearchController alloc] initWithSearchResultsController:nil]];
[[self searchController] setSearchResultsUpdater:self];
[[[self searchController] searchBar] setFrame:CGRectMake(0.0f,0.0f,CGRectGetWidth([[self tableView] frame]),44.0f)];
[[[self searchController] searchBar] setSearchBarStyle:UISearchBarStyleMinimal];
[[[self searchController] searchBar] setPlaceholder:@"Search Presentations"];
[[[self searchController] searchBar] setDelegate:self];
[[self tableView] setTableHeaderView:[[self searchController] searchBar]];
[[self tableView] setSeparatorStyle:UITableViewCellSeparatorStyleNone];
[[self tableView] setAllowsSelection:YES];
[[self tableView] setAllowsSelectionDuringEditing:YES];
[[self tableView] setDelegate:self];
[[self tableView] setDataSource:self];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[self searchResults] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Search Results Cell"];
[cell setSelectionStyle:UITableViewCellSelectionStyleDefault];
[cell setUserInteractionEnabled:YES];
[[cell textLabel] setEnabled:YES];
FXIPresentation *presentation = nil;
presentation = [[self searchResults] objectAtIndex:[indexPath row]];
[[cell textLabel] setText:[[presentation title] substringFromIndex:3]];
[[cell textLabel] setTextColor:[UIColor colorWithRed:(18.0/255.0)
green:(52.0/255.0)
blue:(88.0/255.0)
alpha:1.0f]];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Omitted / Never called
}
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
[self setSearchResults:nil];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"title contains[c] %@",[[[self searchController] searchBar] text]];
[self setSearchResults:[[self fullResults] filteredArrayUsingPredicate:predicate]];
[[self tableView] reloadData];
}
@end
