Using:
UIViewController *vc = [[UIStoryboard storyboardWithName:#"MyStoryboard" bundle:nil] instantiateInitialViewController];
[self presentViewController:vc animated:YES completion:^{}];
But I need to set a BOOL in the initial viewController for that story board.
I have BOOL declared in the .h and an if statement is dependent on it:
if (_boolIsTrue) {
FirstView *firstView = (FirstView *)[storyboard instantiateViewControllerWithIdentifier:#"first_view"];
[self.navigationController setViewControllers:#[firstView] animated:NO];
}
else {
SecondView *secondView = (SecondView *)[storyboard instantiateViewControllerWithIdentifier:#"second_view"];
[self.navigationController setViewControllers:#[secondView] animated:NO];
}
When I try to access it with something like:
UIStoryboard *storybord = [UIStoryboard storyboardWithName:#"MyStoryboard" bundle:nil];
UIViewController *vc =[storybord instantiateInitialViewController];
vc does not give me access to the BOOL.
Not sure what it is that I am not understanding about ViewControllers and Storyboards, but I would really appreciate the help.
Thanks
EDIT AFTER SOLUTION:
Wain was exactly right!
Here's the exact working code since my gaps spanned a couple different concepts. In case it helps someone else:
UINavigationController *nav = [[UIStoryboard storyboardWithName:#“MyStoryBoard” bundle:nil] instantiateInitialViewController];
InitialLockSetupViewController *vc = nav.viewControllers.lastObject;
vc.isBoolTrue = YES;
[self presentViewController:nav animated:YES completion:^{}];
So you have to get the View Controller with the correct type in order to access the var. BUT if it's not set as the initial view controller in the storyboard you have to get it as the root (0-th) view controller on the stack. THEN you have to remember to push the nav controller NOT the view controller.
Thanks again Wain. This was a good lesson!
You're simply not understanding that the compiler needs to know the class type. Currently you're telling the compiler that the class is UIViewController and it obviously doesn't have your custom property. You need to set the class to your custom one, like:
MyViewController *vc = [storybord instantiateInitialViewController];
Also, make sure that you don't call instantiateInitialViewController more than once or you'll have multiple copies of the same class and might use the wrong one...
Related
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 got a source code for an existing app. throughout the app the developer didn't use storyboard for the user interface but rather he used interface builder xib files. As a new developer, i don't know how to develop iOS apps in xcode using xib files for viewcontrollers, i learnt the storyboard way. Now I want to add more screens to the apps source code, i created a new storyboard file to define my new screens, how do I navigate to the entry point of this new storyboard from a button action i defined in one of the xib files so that i can easily implement my features.
while searching i got some suggestions like this one
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"newStoryboard_iPhone" bundle:nil];
MyNewViewController *myVC = (MyNewViewController *)[storyboard instantiateViewControllerWithIdentifier:#"myViewCont"];
but i dont think i understand how to implement this even if this can be in a button IBAction method. and besides subsequent navigations would be segues through the view controllers i define in the new storyboard
It's right suggestion.
You should get storyboard object by its name. Then you should create your viewController using [storyboard instantiateViewControllerWithIdentifier:#"..."];
Then you may navigate to your new VC using appropriate navigation method. For example:
[self.navigationController pushViewController:vc animated:YES]
ViewController identifier you should set in Interface Builder under section "Identity Inspector" in field "Storyboard ID".
That code you should place in IBAction method. But better would be to extract it in separate method. Something like this:
- (IBAction)buttonPressed:(UIButton *)sender {
[self navigateToMyNewViewController];
}
- (void)navigateToMyNewViewController {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"myNewStoryboard" bundle:nil];
MyNewViewController *myNewVC = (MyNewViewController *)[storyboard instantiateViewControllerWithIdentifier:#"MyNewViewController"];
[self.navigationController pushViewController:myNewVC animated:YES];
}
Navigation from MyNewViewController your can implement as you want. It may be segues.
MyNewViewController *myVC = [self.storyboard instantiateViewControllerWithIdentifier:#"YOUR_VC_NAME_HERE"];
This will instantiate your ViewController, from here you can present it like so
[self presentViewController:myVC animated:YES completion:nil]
The image shows where you set the storyboard name that you're referring to
Try This it's working for me ,
Use below line of code :
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main"bundle:nil];
LoginViewController *loginVC = (LoginViewController*)[storyboard instantiateViewControllerWithIdentifier:#"LoginViewController"];
[self.navigationController pushViewController:loginVC animated:YES];
We need to set storyboard id as per mention in below,
you can navigate one storyboard to another storybord:
first you import your viewcontroller class to appdelegate.h
AppDelegate *appDelegateTemp = [[UIApplication sharedApplication]delegate];
appDelegateTemp.window.rootViewController = [[UIStoryboard storyboardWithName:#"storyboard_name" bundle:[NSBundle mainBundle]] instantiateInitialViewController];
Like the way you use storyboard, use
MainViewController *mainVC = [[MainViewController alloc] initWithNibName:#"MainViewController" bundle:nil]
[self.navigationController pushViewController:mainVC animated:YES];
I added one ViewController to my project and created one class.
After I bind this class to my ViewController.
In another controller I have method:
- (IBAction)login:(id)sender {
// How here I can do redirect to controllerViewController
}
There are two ways to push view controllers in the application.
1) by Segue
2) By View controller identifier
1) By Segue :
[self performSegueWithIdentifier:"SegueIdentifier" sender:self];
2) By View controller identifier :
Yourclassname *gotoYourClass = [self.storyboard instantiateViewControllerWithIdentifier:#"ViewControllerIdentifier"];
[self.navigationController pushViewController:gotoYourClass animated:YES];
- (IBAction)login:(id)sender {
ViewController *vc = [[ViewController alloc]initWithNibName:#"ViewController" bundle:nil];
[self presentViewController:vc animated:YES completion:nil]; }
In the storyboard give your view controller an identifier (under the Attributes Inspector) then use the following code, to bring that view forward.
IF YOU WANT TO USE PUSH THEN USE THIS CODE
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"STORYBOARDNAME" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"VIEWCONTROLLERIDENTIFIER"];
[self.navigationController pushViewController:vc animeted:YES];
IF YOU WANT TO PRESENT THEN USE THIS CODE
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"STORYBOARDNAME" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"VIEWCONTROLLERIDENTIFIER"];
[self presentModalViewController:vc animated:YES];
Note: In UIViewController please enter your view controller name which you want to push into another view.
If you want to comeback to the current ViewController later then use Navigation ViewController or else just use the presentedViewController of self(your current viewController)- no going back business, like they have previously illustrated.
For a simple block of execution(demo or practice) it's all the same but for a project application it completely matters to make the correct choice.
I have a custom UIVieController class that it's not included in any StoryBoard, I need to call from this class an UIViewController that is included in a StoryBoard, I tried many ways to do this but it doesn't work, always get a NSException because when I try to instance the UIViewController of the StoryBoard and get a nil object.
I don't know why it's happening this, I really appreciate any help with this.
Thank you.
Just to clarify in this code I omitted the pushing of the view to the UINavigationController.
I tried this.
+(void)loadSocialMediaAppSegue:(AXISAppDelegate*)delegate withName:(NSString*)segueId{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
AXISWebViewViewController *axisWebView = [storyboard instantiateViewControllerWithIdentifier:segueId];
}
and this
+(void)loadSocialMediaAppSegue:(AXISAppDelegate*)delegate withName:(NSString*)segueId{
AXISWebViewViewController *axisWebView = [delegate.window.rootViewController.storyboard instantiateViewControllerWithIdentifier:segueId];
}
Ok the first thing you need to do is to add a identifier to you view controller at Storyboard, you can do that opening the Storyboard's Identity Inspector and fill the storyboard id field.
Now you are able to call this UIViewController from any place you want like this:
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"the name of your storyboard" bundle:nil];
UIViewController *vc = [sb instantiateViewControllerWithIdentifier:#"the id of your view controller"];
I hope this can help you.
Please post the code you are using to instantiate the VC from the Storyboard.
In general:
To instantiate a View Controller from StoryBoard:
MyViewController *MyVC = [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:#"MyViewController"];
Make sure you set the Storyboard ID and Restoration ID and Class name to "MyViewController" or whatever you want to call it and use that as the parameter for instantiateViewControllerWithIdentifier:
Then if you are in a navigation controller, simply push the instantiated view controller onto the navigation stack:
[self.navigationController pushViewController:MyVC animated:YES];
or present it modally:
[self presentViewController:MyVC animated:YES completion:nil];
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];