爲什麼開始搜索時我的搜索表視圖不顯示？

Question

我已將UISearchDisplayController與搜索欄一起連接到我的應用程序中。我已將其初始化爲：

self.filteredObjectArray = [NSMutableArray arrayWithCapacity:[self.objectArray count]]; 

UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 43)]; 
searchBar.delegate = self; 
[self.view addSubview:searchBar]; 

UISearchDisplayController *searchDisplay = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; 
searchDisplay.delegate = self; 
searchDisplay.searchResultsTableView.delegate = self; 
searchDisplay.searchResultsDataSource = self; 
searchDisplay.searchResultsDelegate = self; 

這是我在其他示例中看到的方式。我也實施了相應的委託方法，如下所示的重要filterContentForSearchText和shouldReload *方法：

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope 
{ 
    [self.filteredObjectArray removeAllObjects]; // First clear the filtered array. 

    for (XRay *xray in objectArray) { 
     NSString *combinedLabel = [self combinedLabel:xray]; 
     if ([combinedLabel rangeOfString:searchText options:(NSCaseInsensitiveSearch)].location != NSNotFound) { 
      [self.filteredObjectArray addObject:xray]; 
     } 
    } 
} 

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString 
{ 
    [self filterContentForSearchText:searchString scope: 
    [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]]; 
    return YES; 
} 

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption 
{ 
    [self filterContentForSearchText:self.searchDisplayController.searchBar.text scope: 
[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]]; 
    return YES; 
} 

然而，當我給搜索文本框中焦點或輸入任何字符，我的搜索是行不通的。您還會注意到灰色的視圖不會顯示在我的常規表格視圖中。

編輯 的cellForRowAtIndexPath

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"XraySearchChoice"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; 
    } 

    XRay *xray = nil; 
    if (tableView == self.searchDisplayController.searchResultsTableView) { 
     xray = [self.filteredObjectArray objectAtIndex:indexPath.row]; 

    } else { 
     xray = [self.objectArray objectAtIndex:indexPath.row]; 
    } 

    cell.textLabel.text = [self combinedLabel:xray]; 

    return cell; 
} 

Answer 1

我想通了，什麼是錯的，我有點驚訝，說實話。一旦我在SearchTableViewController上設置了一個屬性： @property（nonatomic，strong）UISearchDisplayController * searchDisplay;

並更新我的代碼來使用那個，一切從那裏工作。這是我用新屬性初始化的代碼。

- (void)viewDidLoad 
{ 
    self.filteredObjectArray = [NSMutableArray arrayWithCapacity:[self.objectArray count]]; 

    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 43)]; 
    searchBar.delegate = self; 
    self.tableView.tableHeaderView = searchBar; 

    self.searchDisplay = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; 

    self.searchDisplay.delegate = self; 
    self.searchDisplay.searchResultsDataSource = self; 
    self.searchDisplay.searchResultsDelegate = self; 
} 

Answer 2

Try with below code it will help you 

self.filteredObjectArray = [NSMutableArray arrayWithCapacity:[self.objectArray count]]; 
    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 43)]; 
    searchBar.delegate = self; 
    //[self.view addSubview:searchBar]; 
    self.theTableView.tableHeaderView = searchBar;//theTableView your tableview object 

    UISearchDisplayController *searchDisplay = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; 
    self.searchController = searchDisplay; 
    [searchBar release]; 
    searchDisplay.delegate = self; 
    searchDisplay.searchResultsDataSource = self; 
    searchDisplay.searchResultsDelegate = self;