I have a working application with a UITableViewController as a root view controller.
I need to pop a simple log-in screen on app launch,
and i can't set it as root view controller because it's against the project properties.
also, im using storyboard.
Simply, in root view controller (UITableViewController in your case) viewDidAppear's method, present log-in screen as modalViewController. You need to set the Identifier for your ViewController first.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Storyboard"
bundle:nil];
LoginViewController *lgn = [storyboard instantiateViewControllerWithIdentifier:#"LoginView"];
[self presentViewController:lgn animated:YES completion:NULL];
Use your own storyboard and viewController names.
In App Delegate
loginViewController = [[BANLoginViewController alloc] initWithNibName:#"BANLoginViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:loginViewController];
[window addSubView:[navController view]];
[window makeKeyAndVisible];
And in the BANLoginViewController you could check if the user is logged in or not and then initialise the main storyboard.
Related
First, I am using storyboards for my navigation. I have come to a point where I am at a menu screen that goes off to 4 different views (just with a navigation controller) for 2 of those views I want it to check if the user has logged in and if not I want the LoginViewController/View brought up. I am very new to objective c/xcode and after searching for a solution this is what i have come up with. I do not know how to tie this in to my program. Does this just need to be linked to my button or am i completely off with what i am doing now?
if (self.appDelegate.userHasActiveLogin) {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"ViewController2"];
[vc setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentModalViewController:vc animated:YES];}
else {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"LoginController"];
[vc setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentModalViewController:vc animated:YES];
}
What you could do is to create manual segues in your storyboard.
Ctrl-drag from your menu controller (orange symbol) to the child controller, select push. Click on the segue and give it an identifier in the attributes inspector. Now you can check if user is logged in and then conditionally call [self performSegueWithIdentifier:#"logged in segue" sender:self]; in your menu's VC.
The condition is that all the VCs must be in the same storyboard, but I suspect that is the case.
in ios app i want to implement "navigation-bar" and "side-bar" both in a single app like below image
for the tabbar controller i have to assign as a rootviewcontroller
and for sidebar controller also have to assign as a rootviewcontroller.
[self.window addSubview:[tabBarController view]];
and
MenuViewController *menuViewController = [[MenuViewController alloc] initWithNibName:#"MenuViewController" bundle:nil];
self.window.rootViewController = menuViewController;
how two different tab-bar assigned as rootviewcontroller, any idea.. thanks in advance
For Example, I have 2 Storybards. In the first Storyboard I have a View with a button and when you press the button the second storyboard should appear.
How can I do that?
Take a look at the docs for the storyboard class
You can create a storyboard using
UIStoryBoard *storyboard = [UIStoryboard storyboardWithName:#"secondStoryboard" bundle:nil];
and get view controllers from it like
UIViewController *initialViewController = [storyboard instantiateInitialViewController];
or
UIViewController *otherViewcontroller = [storyboard instantiateViewControllerWithIdentifier:#"otherController"];
Once you've got your view controllers you can just push them onto your navigation controller I guess.
However, I don't know what will happen with using two storyboard objects in the same view hierachy - it's probably fine but you never know :)
Even though your question is a bit confusing, I think I know what you are trying to do.
You want to use two storyboards. UIStoryboard has a method to retrieve an instance of any storyboard with a given name. So first, set a name for your storyboards and view controllers in Xcode and then load them up, and then from within any view controller:
UIStoryboard *anotherStoryboard = [UIStoryBoard storyboardWithName:#"SomeStoryboardName" bundle:nil];
Afterwards, instantiate the desired UIViewController from any storyboard:
UIViewController *anotherViewController = [anotherStoryboard instantiateViewControllerWithIdentifier:#"SomeViewControllerName"];
You could then push it into your navigation stack, for instance:
[self.navigationController pushViewController:anotherViewController animated:YES];
Modifided to be generic here's the way I do this in my app...
UIStoryboard *alternateStoryboard;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
alternateStoryboard = [UIStoryboard storyboardWithName:#"Alternate_iPad" bundle:nil];
} else {
alternateStoryboard = [UIStoryboard storyboardWithName:#"Alternate_iPhone" bundle:nil];
}
AlternateController *altController = [alternateStoryboard instantiateInitialViewController];
[altController setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentModalViewController:altController animated:YES];
If your app is only iPhone or iPad that can be reduced to...
UIStoryboard *alternateStoryboard = [UIStoryboard storyboardWithName:#"Alternate" bundle:nil];
AlternateController *altController = [alternateStoryboard instantiateInitialViewController];
[altController setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentModalViewController:altController animated:YES];
You'll probably want to change the last 2 lines to suit the presentation style that you want.
I'm trying to switch views in an iPhone application, but whenever I click on the button to bring up the second view, all I get is a blank screen, even though I've filled the view with buttons and whatnot.
I've checked the second ViewController in my storyboard file and its custom class is the one that it needs to be (When I originally created the second ViewController class a new interface file came with it, which I promptly deleted). What might I be doing wrong?
- (IBAction)Transition_NEXT:(id)sender
{
nextViewController = [[NextViewController alloc]
initWithNibName:#"NextViewController"
bundle:[NSBundle mainBundle]];
[self presentModalViewController:nextViewController animated:NO];
}
I don't think you're using Storyboards correctly. You shouldn't be using initWithNibName, as that's the old method of instantiating a view controller. Try using the new instantiateViewControllerWithIdentifier like so:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:[NSBundle mainBundle]];
UIViewController *nextView = [storyboard instantiateViewControllerWithIdentifier:#"NextViewController"];
[self.view presentModalViewController:nextView animated:YES];
If you already have a reference to your storyboard in your controller, then you shouldn't initialize a new one, but instead you should just use the reference you have.
UIViewController *nextView = [self.storyboard instantiateViewControllerWithIdentifier:#"NextViewController"];
[self.view presentModalViewController:nextView animated:YES];
I have a my views and controllers set up like so.
A Tab/Bar controller
Within 1. is a root view controller
within 2. is a programmatically created navigation controller, that is displayed as a subview in the root view controller.
What I am trying to do is access the top tab bar/navigation controller so that i can push a view onto it.
I tried parentViewController but all it did was push the view onto the programmed nav controller.
any suggestions?
This is how i set up my root view controller:
-(void)viewDidAppear:(BOOL)animated{
NSLog(#"ROOT APPEARED");
[super viewDidAppear:animated];
WorklistViewController *worklistController = [[WorklistViewController alloc]initWithNibName:#"WorklistView" bundle:[NSBundle mainBundle]];
UINavigationController *worklistNavController = [[UINavigationController alloc] initWithRootViewController:worklistController];
worklistNavController.navigationBar.barStyle = UIBarStyleBlackOpaque;
worklistNavController.view.frame = watchlistView.frame;
[worklistNavController.topViewController viewDidLoad];
[worklistNavController.topViewController viewWillAppear:YES];
[self.view addSubview:worklistNavController.view];
GetAlertRequestViewController *alertsController = [[GetAlertRequestViewController alloc]initWithNibName:#"AlertsView" bundle:[NSBundle mainBundle]];
UINavigationController *alertsNavController = [[UINavigationController alloc] initWithRootViewController:alertsController];
alertsNavController.navigationBar.barStyle = UIBarStyleBlackOpaque;
alertsNavController.view.frame = alertsView.frame;
[alertsNavController.topViewController viewDidLoad];
[alertsNavController.topViewController viewWillAppear:YES];
[self.view addSubview:alertsNavController.view];
}
A nested ViewController (ie, inside a view controlled by a ViewController that's actually on the NavController stack) doesn't have direct access to the UINavigationController that its parent's view's controller is a stack member of. That's one MOUTHFUL of a sentence, but the sense of it is: you can't get there from here.
Instead you've got to get at the app's NavController via the App delegate.
YourAppDelegate *del = (YourAppDelegate *)[UIApplication sharedApplication].delegate;
[del.navigationController pushViewController:nextViewController animated:YES];
You're using your UIApplication's singleton (contains all sorts of good info about your app), which has a .delegate property pointing to the AppDelegate, and that contains a reference to the NavigationController.
This is how the "Navigation-based Application" Xcode template sets up NavController ownership, anyway. YMMV if you rolled your own--though if you did, you probably wouldn't need to ask this question.
You can use the follow instruccion:
[(UINavigationController *)self.view.window.rootViewController pushViewController:vc animated:YES];
It works for me :D
Have a look at UIViewController's navigationController and tabBarController properties. These will return the corresponding navigationController or tabBarController that the given UIViewController 'belongs' to.
So you can do something like:
[customController.navigationController pushViewController:newController animated:YES];
// Similarly for tabBarController ...