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我有一个 iPad SplitViewController 应用程序，我在其中以纵向和横向模式隐藏左窗格。当应用程序收到某个通知时，我需要在其弹出窗口中显示左窗格。尽管尝试了许多不同的建议解决方案，但我仍在努力解决如何实现这一目标。

我正在使用包含以下代码的 MultipleMasterDetailManager 实现：

/* forward the message to the current detail view
 * all detail views must implement UISplitViewControllerDelegate
 */
-(void)splitViewController:(UISplitViewController *)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)pc
{
    self.masterBarButtonItem = barButtonItem;
    self.masterPopoverController = pc;

    barButtonItem.title = NSLocalizedString(@"Show Sidebar", @"Show Sidebar");

    [self.currentDetailController.navigationItem setLeftBarButtonItem:self.masterBarButtonItem animated:YES];
}

/* forward the message to the current detail view
 * all detail views must implement UISplitViewControllerDelegate
 */
-(void)splitViewController:(UISplitViewController *)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    //if (![self.currentDetailController isKindOfClass:[SyncSourceDetailViewController class]])
    //{
        self.masterBarButtonItem = nil;
        self.masterPopoverController = nil;

        [self.currentDetailController.navigationItem setLeftBarButtonItem:nil animated:YES];    
    //}    
}

详细视图控制器本身也存在类似的方法。

我收到通知时调用的方法如下：

- (void)navigateToLatest 
{   
        [self navigateToDocumentsTab];  
        [[self dataLoader] navigateToLatest];  // populates data for the left table view 
        UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;
        UIView *view = [[[[[splitViewController viewControllers] objectAtIndex:1] viewControllers] objectAtIndex:0] view];  

        [self.masterDetailManager.masterPopoverController presentPopoverFromRect:CGRectMake(0, 0, 100, 100) inView:view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}

这不起作用。我也尝试过使用 presentPopoverFromBarButtonItem 方法，但我似乎无法在代码中找到 leftBarButtonItem。

也许我正在以完全错误的方式解决这个问题。

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1 回答 1

2

我最终通过在 navigateToLatest 方法中将我的应用程序委托中的“showSidebar”变量设置为 true 来解决这个问题。然后在 DetailViewController 的 ViewDidAppear 事件中检查此变量的值，如果为真，则使用以下代码显示侧边栏：

UIPopoverController *masterPopoverController= [[theAppDelegate masterDetailManager] masterPopoverController];
        [masterPopoverController presentPopoverFromBarButtonItem:[self.navigationItem leftBarButtonItem] permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
        [theAppDelegate setShowSidebar:NO];
于 2012-08-08T03:19:52.263 回答