pushfrontviewcontroler 打开黑屏

Question

我需要通过SWRevealViewController 将第二个视图控制器设置为root。但是当我打电话给pushFrontViewcontroler 时，它变成了一个空白屏幕。我在情节提要中定义的所有标签都丢失了。但是我包含的外部 xib 可以正确显示。我错过了什么吗？请赐教如何解决这个问题。下面是我用来调用第二个视图控制器的代码。

SWRevealViewController *revealController = self.revealViewController;

ImageDetailViewController *imageViewController = [[ImageDetailViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:imageViewController];

[revealController pushFrontViewController:navigationController animated:YES];

我也尝试使用它，但仍然失败

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:imageViewController];

[self.revealViewController setFrontViewController:navigationController];
[self.revealViewController setFrontViewPosition: FrontViewPositionLeft animated: YES];

Storyboard

Answer 1

您的主要问题是 imageViewController 的实例化

ImageDetailViewController *imageViewController = [[ImageDetailViewController alloc] init];

如果你这样做

ImageDetailViewController *imageViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"MyImageViewController"];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:imageViewController];
[revealController pushFrontViewController:navigationController animated:YES];

这很完美，但我仍然建议您将 navViewControllers 放在情节提要上并像此代码一样更改它们

     - (void) goMainViewControllerAction
    {
    UINavigationController* navigationController = [self.storyboard instantiateViewControllerWithIdentifier:@“MainNavViewController”];
    [self.revealViewController pushFrontViewController:navigationController   animated:YES];
     }
  //

- (void) goImageViewControllerAction
    {
       UINavigationController* navigationController = [self.storyboard    instantiateViewControllerWithIdentifier:@"MyImageNavViewController"];
       [self.revealViewController     pushFrontViewController:navigationController animated:YES];
    }

希望对你有帮助