Xcode 如何添加导航栏'；s查看PopOver'；什么是路过视图？

我有一个PopoverController视图，允许用户下载文件。按下按钮时，popOver视图将扩展大小，显示下载状态，主视图控制器将被添加到PopoOverController的“passThroughViews”属性中的未隐藏的“cover”视图遮挡，这样用户就不会在下载文件时意外关闭popOver

我的问题是，在故事板中，我的主viewController嵌入在导航控制器中。我似乎无法用情节提要中的视图覆盖导航控制器的栏，如果用户按下导航栏上的任何位置，则弹出窗口将消失，用户将丢失下载进度栏

如何用我的“cover”视图覆盖导航栏，或者如何将导航栏的视图添加到popOverController的passthroughView

从主viewController打开Popover：

- (IBAction)openDataOptionsPopOver:(id)sender  
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    PopOverViewController *optionsWindow = [storyboard instantiateViewControllerWithIdentifier:@"dataOptions"];
    self.popUp = [[UIPopoverController alloc] initWithContentViewController:optionsWindow];
    [self.popUp setDelegate:self];
    [nextNavButton setEnabled:NO];               //Disabling barButtonItem on the navigationController
    optionsWindow.containerPopOver = self.popUp; //Pointer to the popover, to resize it later.
    optionsWindow.coverView = self.coverView;    //Pointer to the coverView, to (un)hide later
    [popUp presentPopoverFromRect:[sender frame] inView:[sender superview]  permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES]; 
}

//Expands the popOver on press of "refreshFileButton" to display progressView
-(void) explodeWindow
{
    //setting self.navigationController.view and ...visibleViewController.view here didn't seem to work ...
    [containerPopOver setPassthroughViews:[NSArray arrayWithObjects:coverView, nil]];
    [containerPopOver setPopoverContentSize:CGSizeMake(600, 400) animated:YES];
    [titleBarItem setTitle:@"Downloading File.  Please Wait ..."];
    [refreshFileButton setHidden:YES];
    [progressView setHidden:NO];
    [downloadLabel setHidden:NO];
    [coverView setHidden:NO];
    [progressView setProgress:0.0 animated:NO];
}

在PopOverview控制器内设置PassThroughView属性：

- (IBAction)openDataOptionsPopOver:(id)sender  
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    PopOverViewController *optionsWindow = [storyboard instantiateViewControllerWithIdentifier:@"dataOptions"];
    self.popUp = [[UIPopoverController alloc] initWithContentViewController:optionsWindow];
    [self.popUp setDelegate:self];
    [nextNavButton setEnabled:NO];               //Disabling barButtonItem on the navigationController
    optionsWindow.containerPopOver = self.popUp; //Pointer to the popover, to resize it later.
    optionsWindow.coverView = self.coverView;    //Pointer to the coverView, to (un)hide later
    [popUp presentPopoverFromRect:[sender frame] inView:[sender superview]  permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES]; 
}

//Expands the popOver on press of "refreshFileButton" to display progressView
-(void) explodeWindow
{
    //setting self.navigationController.view and ...visibleViewController.view here didn't seem to work ...
    [containerPopOver setPassthroughViews:[NSArray arrayWithObjects:coverView, nil]];
    [containerPopOver setPopoverContentSize:CGSizeMake(600, 400) animated:YES];
    [titleBarItem setTitle:@"Downloading File.  Please Wait ..."];
    [refreshFileButton setHidden:YES];
    [progressView setHidden:NO];
    [downloadLabel setHidden:NO];
    [coverView setHidden:NO];
    [progressView setProgress:0.0 animated:NO];
}

我尝试将self.navigationController.view添加到passthroughview中，但没有成功——它实际上是一个空指针。而且，我似乎无法在故事板中的任何级别放置UIView，以覆盖我的所有控件，而不遮挡popOver。我错过了什么？谢谢你的阅读

编辑： 正如Aglaia在下面指出的，实现以下内容并避免传递视图可能是实现这一点的最佳方法

- (BOOL)popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController
{
    //Don't dismiss our popover when the view covering our controls is present
    if([coverView isHidden]){
        return YES;
    }else{
        return NO;
    }
}

---

也许我遗漏了一些东西，但为什么不实现一个新的视图控制器，将其导航栏设置为“无”，然后按按钮以模式显示它呢？下载完成后，您只需关闭视图控制器

如果希望用户查看基础视图，可以改用UIAlertView

或者，将您的view controller设置为popover controller的代理，并禁止用户通过外部触摸关闭您的popover

    - (BOOL) popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController
{
    return NO;
}

---

然后，当您要取消该功能时，请调用dismissPopoverAnimated:

覆盖整个屏幕，包括导航栏：

[myView setFrame:[[UIScreen mainScreen] bounds];
[self.navigationController.view addSubview:myView];

---

使用

PopOvercontrollersouldDismissPopOver

可能是完成我尝试的任务的最佳方法。不过，我仍然想知道是否有办法将导航栏视图添加到“passthroughview”中。