从另一个ViewController激活UISearchDisplayController

Question

我有一个应用程序，将受益于主屏幕上的搜索功能。我已经编写了一些完成此任务的代码，但它不会找到结果，并且在UISearchBar上点击（x）时会崩溃。我一直在试图弄清楚为什么它不起作用。

主视图控制器（与 '搜索' 主屏幕上栏）：

ViewController *viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"CenterViewController"]; 


     [self.navigationController pushViewController:viewController animated:YES]; 
     [viewController sendSearchRequest:[nameLabel text] sport:[sportLabel text]]; 

视图控制器（查看与tableview中和UISearchDisplayController）

-(void)sendSearchRequest:(NSString *)request sport:(NSString *)sport{ 
    [self.filteredArray removeAllObjects]; // First clear the filtered array. 
    self.searchText = request; 

    /* 
    * Search the main list for products whose type matches the scope (if 
    * selected) and whose name matches searchText; add items that match to the 
    * filtered array. 
    */ 
    [self.filteredArray removeAllObjects]; // First clear the filtered array. 
    self.searchText = request; 

    /* 
    * Search the main list for products whose type matches the scope (if 
    * selected) and whose name matches searchText; add items that match to the 
    * filtered array. 
    */ 
    NSLog(@"Request: %@", request); 
    for (Athlete *athlete in self.athletes) { 
     NSComparisonResult result = [[athlete name] compare:request options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [request length])]; 
     if (result == NSOrderedSame) { 
      [self.filteredArray addObject:athlete]; 
     } 
    } 
    [self.searchDisplayController setActive: YES animated: YES]; 
    [self.searchDisplayController.searchBar setText:request]; 



} 

Answer 1

事实证明，它有没有做适当的激活。基本上，我有一个我正在过滤的数组，但它在视图加载时被初始化。那么，因为我非常全面地调用视图，它从来没有下载过这个数组。相反，我从主视图控制器下载数组，并在搜索视图控制器中搜索该数组。问题解决了。