iOS：导航到未直接与应用程序委托连接的视图控制器

Question

I am building an iOS app and I am facing with an issue which I am finding it a bit difficult to sort out.

The structure of the app is such that I have a MainViewController which is the initial view controller rendered when my app launches. I have built this in storyboard and are connected via segues.

MainViewController 
-> UINavigationController
 ->  HomePageViewController
   ->  ContactListViewController
     ->   DetailsViewController

My hierarchy would appear as above. The flow works fine in normal cases. Now my case is such that when I receive a push notification, I need to render the DetailsViewController directly.

I know that my push notifications are handled in my app delegate's didReceiveRemoteNotification method. So I have done,

def application(application, didReceiveRemoteNotification: userInfo)
  NSLog('Remote notification: %@', userInfo['aps']['alert'])
  push_notification_alert(userInfo)
end

private

def push_notification_alert(userInfo)
  alert = UIAlertView.alloc.initWithTitle( 'Title',
                                         message: userInfo['aps']['alert'],
                                         delegate: self,
                                         cancelButtonTitle: 'Reject',
                                         otherButtonTitles: 'Accept', nil)
  alert.show
end

def alertView(alertView, clickedButtonAtIndex:buttonIndex)
  if(buttonIndex == alertView.cancelButtonIndex)
    ;
  else
    # I need to display the DetailsViewController controller from here. 
  end
end

What I am trying to do is that as soon as I receive a push notification, I display an alert to the user which asks him to reject or accept the notification. If he accepts the notification, then I need to display the DetailsViewController.

Hope, you have got the issue. Do put in your inputs and it will of great help.

Answer 1

Once I found this somewhere in SO, and worked for me. Try this:

UIViewController *rootController = (UIViewController *)self.window.rootViewController;
UIViewController *notificationController = [rootController.storyboard instantiateViewControllerWithIdentifier:@"My Push Notification View"];

[rootController presentViewController:notificationController animated:YES completion:NULL];

Hope this helps .. :)

Answer 2

try the following methods,but 3rd method is not recommended because it instantiating new instance unnecessarily if already detailviewcontroller pushed in to the navigation stack

1)get visibleViewcontroller or topViewController and push

[navigationController.visibleViewController performSegueWithIdentifier:@"detailview" sender:self];

or

[navigationController.topViewController performSegueWithIdentifier:@"detailview" sender:self];

2)performSegue

[[[navigationController viewControllers] objectAtIndex:0]     performSegueWithIdentifier:@"detailview" sender:self];

3)instantiate new instance and push

NSString * storyboardName = @"MainStoryboard_iPhone";
NSString * viewControllerID = @"YourID";
UIStoryboard * storyboard = [UIStoryboard storyboardWithName:storyboardName bundle:nil];
DetailsViewController * controller = (DetailsViewController *)[storyboard    instantiateViewControllerWithIdentifier:viewControllerID];
[self presentViewController:controller animated:YES completion:nil];

DetailsViewController.yourproperty = @"received push notification";
[yournavigationController pushViewController:DetailsViewController animated:YES];