从自定义工具栏中呈现视图控制器

Question

在我的应用程序中，我多次使用相同的底部工具栏。所以我创建了包含4个UIBarButtonItems的新的UITollbar类。如何编写它们以呈现另一个视图控制器？我不想每次都这样做，当我创建新的视图控制器时，所以我更喜欢这样做一次，并为每个相同的工具栏使用这个类。 例如，这是我所有按钮的作用：

- (void)actionButtonTapped:(UIBarButtonItem*)barButtonItem { 

    switch (barButtonItem.tag) { 
     case BacklogButton: 
      break; 

     case MyTicketsButton: 
      break; 

     case FilterButton: 
      break; 

     case ProjectsButton: 
      break; 
    } 
} 

它的工作不错，但使用presentViewController我必须在UIViewController类。我需要你的帮助。

UPD。 我为你们写了更多的代码来解释我的问题。

- (void)actionButtonTapped:(UIBarButtonItem*)barButtonItem { 

    switch (barButtonItem.tag) { 
     case BacklogButton: 
      [self presentViewControllerFromStoryBoardName:@"TRBacklogViewController"]; 
      break; 

     case MyTicketsButton: 
      [self presentViewControllerFromStoryBoardName:@"TRMyTicketsViewController"]; 
      break; 

     case FilterButton: 
      [self presentViewControllerFromStoryBoardName:@"TRFilterViewController"]; 
      break; 

     case ProjectsButton: 
      [self presentViewControllerFromStoryBoardName:@"TRProjectsViewController"]; 
      break; 
    } 
} 

- (void)presentViewControllerFromStoryBoardName:(NSString*)storyboardName { 

    [[UIApplication sharedApplication].delegate.window.rootViewController presentViewController:[self viewControlerFromStoribordName:storyboardName] animated:YES completion:^{ 
    }]; 
} 

- (UIViewController*)viewControlerFromStoribordName:(NSString*)storyboardName { 

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle:nil]; 
    return (UIViewController*)[storyboard instantiateInitialViewController]; 
} 

的问题是 - 我不能做一个以上的时间。其他对按钮的点击失败，并显示错误：“试图在<UINavigationController: 0x7c304600>上显示<UINavigationController: 0x7ab0cc00>，其视图不在窗口层次结构中！”有没有什么方法可以使用pushViewController？

Answer 1

如果你只是想呈现一个VC，你可以根据窗口的rootvc来做到这一点。

 [[UIApplication sharedApplication].delegate.window.rootViewController presentViewController:vc animated:NO completion:^{ 
    }]; 

我希望能帮到你！

Answer 2

试试这个：下面的代码

UIViewController *vc = [[[[UIApplication sharedApplication] delegate] window] rootViewController]; 

[[vc presentedViewController] ? vc.presentedViewController : vc presentViewController:alert animated:YES completion:nil]; 

Answer 3

使用，我希望这会帮助你。

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"NameOfYourStoryBoard" bundle:nil]; 
YourViewController *yourVC = [storyboard instantiateViewControllerWithIdentifier:@"viewControllerIdentifier"]; 
[self presentViewController:yourVC animated:YES completion:nil]; 

Answer 4

我已更新您的代码。

- (void)actionButtonTapped:(UIBarButtonItem*)barButtonItem { 

    switch (barButtonItem.tag) { 
    case BacklogButton: 
     [self presentViewControllerFromStoryBoardName:@"TRBacklogViewController"]; 
    // @"TRBacklogViewController" I think its your View controller Identifier not a storyboard name 
     break; 

    case MyTicketsButton: 
     [self presentViewControllerFromStoryBoardName:@"TRMyTicketsViewController"]; 
     break; 

    case FilterButton: 
     [self presentViewControllerFromStoryBoardName:@"TRFilterViewController"]; 
     break; 

    case ProjectsButton: 
     [self presentViewControllerFromStoryBoardName:@"TRProjectsViewController"]; 
     break; 
    } 
} 

- (void)presentViewControllerFromStoryBoardName:(NSString*)storyboardName { 

[[UIApplication sharedApplication].delegate.window.rootViewController presentViewController:[self viewControlerFromStoribordName:storyboardName] animated:YES completion:^{ 
    }]; 
} 

- (UIViewController*)viewControlerFromStoribordName:(NSString*)storyboardName { 

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil]; 
// May be "Main" is your storyboard name 
    return (UIViewController*)[storyboard instantiateViewControllerWithIdentifier:storyboardName]; 
    // Use object name "viewcontrollerIdentifier" instead of "storyboardName" 

}