iOS UISearchBar:Set-showsScopeBar=YES&ScopeButtonTiles不是nil，但scopeBar不显示

我快疯了！这是我的问题。我想在开始搜索时显示UISearchBar.ScopeBar，并在搜索后隐藏它。我在中找到了一个解决方案帖子 但这对我不起作用。 这是我的密码：

   self.friendSearchBar.scopeButtonTitles = [NSArray arrayWithObjects:@"Phone",@"Name", nil];
   self.friendSearchBar.selectedScopeButtonIndex = 0;
   self.friendSearchBar.showsScopeBar = YES;

---

您好，要在搜索后让搜索栏消失，您需要实现这一点

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
YourScopeGoesHere scopeKey = controller.searchBar.selectedScopeButtonIndex;
[self searchForText:searchString scope:scopeKey];
return YES;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
NSString *searchString = controller.searchBar.text;
[self searchForText:searchString scope:searchOption];
return YES;
}