ios - 从 popoverview 中的按钮调用另一个视图

Question

我有一个 searchcontrollerviewcontroller、detailviewcontroller 和一个 filterviewcontroller

在 Appdelegate 中，我将前 2 个添加为 splitview 控制器并委托给 detailviewcontroller，如下所示：

self.splitViewController.delegate = detailViewController;
self.splitViewController.viewControllers = [NSArray arrayWithObjects:searchViewController, detailNavigationController, nil];

当 ipad 转动时，它会显示 popoverview 的按钮

- (void)splitViewController:(UISplitViewController *)splitController
     willHideViewController:(UIViewController *)viewController
          withBarButtonItem:(UIBarButtonItem *)barButtonItem
       forPopoverController:(UIPopoverController *)popoverController{  

    UIBarButtonItem *filterbutton = [[UIBarButtonItem alloc]initWithTitle:@"Filter"     style:UIBarButtonItemStylePlain target:nil action:@selector(showFilterPopover:)];

    barButtonItem.title = NSLocalizedString(@"Search", @"Search results");
    [self.navigationItem setLeftBarButtonItems:[NSArray arrayWithObjects:barButtonItem,filterbutton, nil] animated:YES];

    self.masterPopoverController = popoverController;
}

我在这里初始化过滤视图

-(void)showFilterPopover: (id) sender{

    FilterViewController *controller = [[FilterViewController alloc]initWithNibName:@"FilterViewController" bundle:nil];

    UIPopoverController *popover =
    [[UIPopoverController alloc] initWithContentViewController:controller];

    popover.delegate = self;
    self.masterPopoverController = popover;


    [self.masterPopoverController
         presentPopoverFromBarButtonItem:sender
                permittedArrowDirections:UIPopoverArrowDirectionAny
                                animated:YES];
}

但是什么也没发生，弹出框适用于详细视图，但不适用于过滤视图....我忘记了什么吗？