UINavigationController回到多个步骤

Question

是否可以在UINavigationController中弹出多个viewcontroller？假设我想走两步。

Answer 1

是的，你可以做到这一点通过执行类似

//Your navigation controller 
UINavigationController *nav; 

//Get the view controller that is 2 step behind 
UIViewController *controller = [nav.viewControllers objectAtIndex:nav.viewControllers.count - 2]; 

//Go to that controller 
[nav popToViewController:controller animated:YES]; 

Answer 2

斯威夫特

在奥马尔呈现迅速相同的解决方案是：

// Get the previous Controller. 
let targetController: UIViewController = navigationController!.viewControllers[navigationController!.viewControllers.count - 2] 

// And go to that Controller 
navigationController?.popToViewController(targetController, animated: true) 

对我来说，我需要后面2个控制器，所以我必须在第三个后援中取得成功。我真正的解决方案是：

// obtaining origin controller 
let controller: UIViewController = navigationController!.viewControllers[navigationController!.viewControllers.count - 2] 

// If was the expected controller (An enroll action) 
if controller is CreateChatViewController { 

    // I get the previous controller from it, in this case, the 3rd back in stack 
    let newControllerTarget = navigationController!.viewControllers[navigationController!.viewControllers.count - 3] 

    // And finally sends back to desired controller 
    navigationController?.popToViewController(newControllerTarget, animated: true) 
}