In my iOS project I have a main menu that is shown embedded in a container in my initial UIViewController.
After the user choses any row in that menu, the navigation controller pushes the submenu viewController that manages further actions, which uses the full window.
If the user wants to go back to main screen, he taps "back" button and my navigationController pops back. But when it should pop to the main viewController it fails to restore the view of my initial viewController.
Do you have any clue how to pop back to the first viewController in navigationViewController hierarchy if that view controller has containers with embedded view controllers in them?
Or should I consider changing the architecture of my storyboard?
The fact that the view controllers in a navigation controller have child view controllers is not important. Only worry about the top-level view controllers that are pushed onto the navigation controller's stack. And only push/pop top-level view controllers, not children.
If you are having problems, you are probably doing something wrong, and will need to post a screenshot of your storyboard, along with the code that shows how you manage your navigation controller stack.
If you want your initial view controller to contain the proper subviews, you either need to hide/show what you need to make it to look like you want in viewDidDisappear as the user moves on to a new view, or you need to set it when they come back in viewWillAppear.
However your view is set up when you leave is how it will show up when you come back unless you change it. For example, in your root view controller:
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
// hide your menu, clean up the view to prepare it for when user pops back
}
OR
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// if menu is showing, hide it. Clean up view before user sees it
}
Related
I am using Storyboards for an iOS 7 App. The root controller is a menu. For almost every view, I have a Menu button which brings the App back to that menu using [self.navigationController popToRootController:TRUE]. However, there are two UIView elements where I would like to clear the Navigation Controller view list (as happens when you pop back to the root controller), but then immediately go to another UIView without having the user see the root controller's view. Once at this new view, if the user presses the back button, I want them to go to the menu view.
I've tried to put a performSegue in the viewWillAppear, but it really messes up the Navigation Controller and views. I've tried putting a performSegue in the viewDidAppear, but the user sees first the Menu view flash in, then out on it's way to the correct view.
I hope I've explained this well enough. I hope this can be done.
Thanks.
Your best bet is to build the navigation controller stack yourself, and then use - (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated: to replace the current stack.
So you could do something like
...
UIViewController *vcToPush = ...;
NSArray *newVCStack = #[[self.navigationController.viewControllers firstObject], vcToPush];
[self.navigationController setViewControllers:newVCStack animated:YES];
This will add your new controller to the stack using the standard push animation (or not if you so choose), and after the animation is complete, set the view stack to that of the array.
I have a TabBarApplication with four views in the main TabBarItem. The problem comes when I go to any of these views and click in any button to go to another view and when I go back by a button linked to the main view, the TabBarItem of the app disappear!!
For example, one view of the app is a tableView in which each element of the list is linked to his external view and it has a back button that should return to the tableView. All the segues are by modal, not push because push segue crash the application and by modal it runs correctly but the problem comes when I returned by clicking the back button of the NavigationItem in the header of the view to his main view and the TabBarItem of the app is not there, is empty.
Each tab should have the view controller set to a navigation controller, with the view controller you want set as the root view controller of the navigation controller. Now you can use push segues and the standard back button that will be added for you. This will bypass the issue (and work much better for you and users).
You current issue is likely related to not really ever going back. Instead, just always presenting new modal view controllers which replace any existing content on screen.
in the top view of my view controller (the last table view controller) has an add navigation item. i added a view controller object from the objects library and i ctrl + dragged from the plus button to the view controller. i tried the app and it works fine but i can't go back to the previous controller when i reach the last controller. since the last controller connected (by segue) to the plus button, i can't have a navigation bar on top. so i added one and added an navigation item called it Done. i created an IBAction method in the class that the last controller subclasses which have the following code:
[self.navigationController popNavigationControllerAnimated:YES];
However, when i run the app and press the Done button to go back, it doesn't work although i feel like what i did is totally legal.
If you would have made the final view controller segue a Push segue, you'd still have the navigation bar with a back button. It makes sense since you're adding a record that you'd want a modal view.
You can dismiss the current modal view with the following code:
[self dismissViewControllerAnimated:YES completion:nil];
Generally, you should use delegation and dismiss it from the presenting view controller. However, I think it's fine to dismiss yourself if you're using storyboards, segues, and ARC.
Did you create a Bar Button Item and assigned its 'selector' callback?
I've looked everywhere for this, so as a last resort I figured I should ask the question.
I'm using Storyboard in XCode and have a navigation controller as my initial view. The root view of this navigation controller is a table view. In this table view, I have a button in the navigation bar that flips the view horizontally via a modal segue to a navigation controller. The root view of this controller is my map view. Now, when I want to dismiss this map view using [self dismissViewControllerAnimated:YES completion:nil] it doesn't work. It does if I take out the navigation controller. So, I'm guessing the dismissViewController is getting passed to the navigation controller, and not doing anything. I know I could implement a class for the navigation controller to handle the call and pass it on, but I don't want to do that unless absolutely necessary.
So to solve this question:
I need a way to switch between table view to map view using the flip horizontally animation and vice versa.
I need to have a navigation controller in both views, I could either be the same one, or a different one. I can't seem to find a way to use the same one, since any transitions would be pushes which don't do the flip horizontally transition.
Thanks in advance for the help!
Who is self when you call [self dismissViewControllerAnimated:YES completion:nil]?
The receiver of this message needs to be the view controller which presented the modal view controller you want to dismiss. If you call it on the presented view controller, or (in the case of container view controllers like UINavigationController, one of the view controllers it manages), UIKit will try to do the right thing but won't always succeed.
Presuming the self you refer to is the view controller containing the map view, you can get the presentingViewController property to get the object you should call dismissViewControllerAnimated:completion: on. (And if you need to get the navigation controller that's in between, use the navigationController property.)
I basically have a splitview controller and immediately I would like to show a popup modal view controller.
I have wired up the UISplitView class with a modal segue to my other view controller (LoginView, just a straight UIViewController subclass) I basically just want to show that on load and I'm pretty sure I shouldn't do this in the app delegate (however I could be wrong)
I want to do it with a
[something performSegueWithIdentifier:#"login" sender:something];
Where should I put it and what should I connect the segue to (I swear I have tried every different combination haha!)
(I'm using the universal master-detail view starting project from Xcode 4.2)
I would display this from your initial detail view controller (the right pane of your split view) since it will always be sent a -viewDidAppear: message regardless of launch orientation.
In your -viewDidAppear: method, have the split view controller present the modal controller. Each view controller in a split view controller will already have its splitViewController property set. Ensure that your segue is connected from the split view controller (not one of its child view controllers) to the login view controller.
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self.splitViewController performSegueWithIdentifier:#"login" sender:self.splitViewController];
}