如何在嵌入在UINavigationController中的另一个Storyboard上以模块化方式呈现UIViewController？

Question

...并将其嵌入导航控制器中。

我有一个故事板，我们称它为MainStoryboard。

在主情节提要板上（initialViewController BTW都不是），我有一个ViewController，我们将其称为ViewControllerZ，嵌入在NavigationController中，将其称为NavigationControllerZ。

当用户单击按钮时...我有...

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
ViewControllerZ *vcZ = (ViewControllerZ *)[storyboard instantiateViewControllerWithIdentifier:@"ViewControllerZ"];
vcZ.delegate = self;
vcZ.blah = blah;
[self.navigationController presentViewController:vcZ animated:YES completion:nil];

但是，这并没有为我提供所需的NavigationController。 我需要MainStorybard的NavigationController，因为ViewControllerZ上的NavBar有一个UIBarButtonItem Cancel，以消除模态显示的视图。

所以要获得我尝试的NavigationController ...

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
NavigationViewControllerA *navVcZ = (NavigationViewControllerZ *)[storyboard instantiateViewControllerWithIdentifier:@"NavigationViewControllerZ"];
ViewControllerZ *vcZ  = (ViewControllerZ *)navVcZ.topViewController;
vcZ.delegate = self;
vcZ.blah = blah;
[self.navigationController presentViewController:vcZ animated:YES completion:nil];

但是，这不起作用，并抛出“由于未捕获的异常'NSInvalidArgumentException'而导致终止应用程序，原因：'应用程序试图以模态形式显示活动控制器”。

我该如何解决这个问题？

Answer 1

从错误看来，您像这样添加了navVcZ作为子视图控制器：

[self.navigationController presentViewController:vcZ animated:YES completion:nil];
[self.navigationController addChildViewController:navVcZ];

您可以直接显示navVcZ ：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
NavigationViewControllerA *navVcZ = (NavigationViewControllerZ *)[storyboard instantiateViewControllerWithIdentifier:@"NavigationViewControllerZ"];
ViewControllerZ *vcZ  = (ViewControllerZ *)navVcZ.topViewController;
vcZ.delegate = self;
vcZ.blah = blah;
[self.navigationController presentViewController:navVcZ animated:YES completion:nil];