I have generated a new Tabbed Application using storyboards.
So far I have
TabBarController
-> FirstViewController
-> SecondViewController
-> ModalViewController
I'm trying to open the modal view before showing the tabBarController. I added the following code on the AppDelegate.m
showModalView is called from application:didFinishLaunchingWithOptions:;
- (void)showModalView
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
GSLoginViewController *loginView = [storyboard instantiateViewControllerWithIdentifier:#"loginView"];
[loginView setModalPresentationStyle:UIModalPresentationFullScreen];
[self.window.rootViewController presentViewController:loginView animated:YES completion:NULL];
}
And here the output I have:
Warning: Attempt to present <ModalViewController: 0x93670d0> on
<UITabBarController: 0x935d170> whose view is not in the window hierarchy!
You are getting this because your Appdelegate don't know that tabbarcontroller is your root view.You should try something like this.
UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
and add your code accordingly.The thing is that you should let the app delegate know tabbarcontroller is the rootviewcontroller.
Related
I have a situation wherein a storyboard made VC(embedded in NavController) should be presented programmatically.
SomeVC -> presents NavController(rootVC) -> rootVC -> pushes subVC
on this representation, subVC should have a back button to go back to rootVC, but I can't implement it this way. Will be providing sample codes that I have already tried.
this pushes the rootVC directly:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"storyBoard" bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"rootVC"];
[self.navigationController presentViewController:vc animated:YES completion:nil];
also tried pushing the navigationController itself, ID has been set on storyboard:
UINavigationController *navController = [storyboard instantiateViewControllerWithIdentifier:#"navigationController"];
[self presentViewController:navController animated:YES completion:nil];
EDIT: storyboard implementation looks like this
I'm not sure if I understand you correctly. You want to present a navigation controller and have those rootVC and subVC already in it, right? So after presenting, you want the subVC to be presented with the back button right away.
If that's the case you need to tell the navigation controller to push the subVC before presenting it
UINavigationController *navController = [storyboard instantiateViewControllerWithIdentifier:#"navigationController"];
UIViewController *subVC = [storyboard instantiateViewControllerWithIdentifier:#"subVC"];
[navController pushViewController:subVC animated:NO];
[self.navigationController presentViewController:vc animated:YES completion:nil];
I need to present a view controller from app delegate.
When a phone notification comes in, I am able to decide which one of 3 view controllers (named ForumViewController, BlogViewController & NewsViewController) should be presented by analyzing the 'userInfo' in the method 'didReceiveRemoteNotification'.
But when i try to present the appropriate view controller using storyboards or the code below:
self.viewController = [[MembersViewController alloc] initWithNibName:#"MembersViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
Then, the app gives the error 'Warning: Attempt to present whose view is not in the window hierarchy!'. Also it gets stuck on a particular view controller.
Please keep in mind that the view controllers that I am trying to present are not part of the flow when the app starts (the flow is LogoViewController -> SplashViewController -> HomeViewController).
The HomeViewController & MembersViewController are essentially the main menu pages for public & private viewing. Here I have to display something to the viewer.
choice-1
using push
UINavigationController *navController = (UINavigationController *)self.window.rootViewController;
MembersViewController *vc = [navController.storyboard instantiateViewControllerWithIdentifier:#"MembersViewController"];
[navController pushViewController:vc animated:YES];
using present
MembersViewController *root = (MembersViewController *)self.window.rootViewController;
UIViewController *vc = [root.storyboard instantiateViewControllerWithIdentifier:#"MembersViewController"];
[root presentViewController:vc animated:YES completion:NULL];
upadted
UIStoryboard *mainstoryboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
MembersViewController* pvc = [mainstoryboard instantiateViewControllerWithIdentifier:#"MembersViewController"];
[self.window.rootViewController presentViewController:pvc animated:YES completion:NULL];
Loading a view controller from the storyboard:
[self performSelector: #selector(ShowModalViewController) withObject: nil afterDelay: 0];
-(void)ShowModalViewController{
NSString * storyboardName = #"MainStoryboard";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"IDENTIFIER_OF_YOUR_VIEWCONTROLLER"];
[self.window.rootViewController presentViewController:vc animated:YES completion:nil];
}
Identifier of your view controller is either equal to the class name of your view controller, or a Storyboard ID that you can assign in the identity inspector of your storyboard.
I want to add a navigationcontroller to an existing viewcontroller which is created using storyboard, i have embed it in a navigation controller, but the code for navigating (shown below) is not working even after embed in the navigation controller:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
EditProfileViewController *nextViewController = [storyboard instantiateViewControllerWithIdentifier:#"EPVController"];
[self.navigationController pushViewController:nextViewController animated:YES];
When i have tried to log self.navigationController, it shows null.
Update: It is fine when i am trying with presentViewcontroller , but i
want to push the viewcontroller with navigationController.
I am struggling with this for two days,Please help.
If self is a subclass of UINavigationController, you do not need to refer to the navigationController property. (Note that this won't work if EditProfileViewController is also a subclass of UINavigationController, as you can't push a UINavigationController inside a UINavigationController).
EditProfileViewController *nextViewController = [storyboard instantiateViewControllerWithIdentifier:#"EPVController"];
[self pushViewController:nextViewController animated:YES];
Otherwise, if you don't have a pre-existing navigation controller
EditProfileViewController *nextViewController = [storyboard instantiateViewControllerWithIdentifier:#"EPVController"];
[self presentViewController:nextViewController animated:YES completion:nil];
I added a new UIViewController to get a log in issue fixed and now the button in the NavigationBar on the next scene are inactive. Here is the code I used to load the new StoryBoard:
-(void)newSotrybooard{
UIStoryboard *settingsStoryboard = [UIStoryboard storyboardWithName:#"LogedIn" bundle:nil];
UIViewController *initialSettingsVC = [settingsStoryboard instantiateInitialViewController];
initialSettingsVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:initialSettingsVC animated:YES completion:NULL];
}
I added the new storyboard after I couldn't get the NavigationBar to show up and push without and error on the main storyboard. This is the only code that has changed. The Navigation Controller does not have a class associated with it and neither does the TableView to follow. I can also not scroll the Table view. Thank you for your help!
Update:
I updated the code above and
The error I receive is:
Warning: Attempt to present <UINavigationController: 0x109fa0ce0> on <PrivateViewController: 0x109f6ef80> whose view is not in the window hierarchy!
Based on the information you have provided, I surmise that the following could be helpful -
Yes, you have used instantiateViewControllerWithIdentifier.
But, remember it instantiates and returns the view controller with
the specified identifier. You're missing that.
Provide the same name to your new Storyboard in your code and
File Inspector (like you named it LogedIn above) and it
should be set in the Main Interface (Target >> General >> Main
Interface).
See rootViewController? The rootViewController
for the window needs to be assigned (either via Storyboard or
programmatically). Please check. I have added a UINavigationController in my example below -
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"StoryboardName" bundle:nil];
ViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"StoryboardName"];
vc.title = #"Is this title visible?";
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
self.window.rootViewController = nav;
return YES;
}
For the ViewController.m
-(void) goToSettings {
UIStoryboard *settingsStoryboard = [UIStoryboard storyboardWithName:#"SettingsStoryboard" bundle:nil];
UIViewController *initialSettingsVC = [settingsStoryboard instantiateInitialViewController];
initialSettingsVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:initialSettingsVC animated:YES completion:NULL];
}
I am trying the "pass the baton" method for passing the managedObjectContext (MOC) thru multiple views. I have it successfully passed to the rootViewController. From there I move to a tabBarController via presentViewController. I can't seem to find a way to pass the MOC when the tabBarController is pushed.
AppDelegate.m
UIViewController *navigationController = (UIViewController *)self.window.rootViewController;
MyViewController *controller = (MyViewController *) navigationController;
controller.managedObjectContext = managedObjectStore.mainQueueManagedObjectContext;
The main view controller is basically a start up screen that will kick you into a login screen or if you are already logged in, to the tabBarController. Below is where I transition to the tabBarController from within the viewDidAppear method.
MyViewController.m
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
The tabBarController in the storyboard has the identifier "mainTabVC".
I've tried lines like
MyTabBarController.managedObjectContext = self.managedObjectContext;
but I get the error Property 'MOC' not found on object of type MyTabBarController even though I do have the property declared in MyTabBarController.h
Could someone show me a line of code that I can throw in this segue to push the MOC to the tab bar controller.
BTW- I'm utilizing RestKit in this app if that changes the way I should be handling this please let me know.
*****Solution********
To make things clear for any other new guys with the same question. I went from this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
To this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
MyTabBarViewController *mainTabVC = [storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
mainTabVC.managedObjectContext = self.managedObjectContext;
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];
Notice the assignment in the third line and using MyTabBarViewController instead of UIViewController in the second line. BIG thanks again to rdelmar!
Your code is somewhat confusing. Is MyTabBarController the class? It looks like mainTabVC is your instance. You should use that rather than the class, and you should change the type when you instantiate mainTabVC to MyTabBarController, instead of UITabBarController. You also don't need to get the storyboard the way you do, you can just use self.storyboard.
MyTabBarController *mainTabVC = [self.storyboard instantiateViewControllerWithIdentifier:#"mainTabVC"];
mainTabVC.managedObjectContext = self.managedObjectContext;
[mainTabVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:mainTabVC animated:NO completion:nil];