ios - UINavigationController 回退不止一步

Question

是否可以在 UINavigationController 中弹出多个视图控制器？假设我想退后两步。

Answer 1

是的，您可以通过执行类似的操作来实现

//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

迅速

很快，奥马尔提出的相同解决方案是：

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

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

就我而言，我需要支持 2 个控制器，因此，我必须在堆栈中采用第三个支持。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)
}