In your appDelegate.m inside your didFinishLaunchingWithOptions
//authenticatedUser: check from NSUserDefaults User credential if its present then set your navigation flow accordingly
if (authenticatedUser)
{
self.window.rootViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateInitialViewController];
}
else
{
UIViewController* rootController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"LoginViewController"];
UINavigationController* navigation = [[UINavigationController alloc] initWithRootViewController:rootController];
self.window.rootViewController = navigation;
}
In SignUpViewController.m file
- (IBAction)actionSignup:(id)sender
{
AppDelegate *appDelegateTemp = [[UIApplication sharedApplication]delegate];
appDelegateTemp.window.rootViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateInitialViewController];
}
In file MyTabThreeViewController.m
- (IBAction)actionLogout:(id)sender {
// Delete User credential from NSUserDefaults and other data related to user
AppDelegate *appDelegateTemp = [[UIApplication sharedApplication]delegate];
UIViewController* rootController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"LoginViewController"];
UINavigationController* navigation = [[UINavigationController alloc] initWithRootViewController:rootController];
appDelegateTemp.window.rootViewController = navigation;
}
Swift 4 Version
didFinishLaunchingWithOptions in app delegate assuming your initial view controller is the signed in TabbarController.
if Auth.auth().currentUser == nil {
let rootController = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "WelcomeNavigation")
self.window?.rootViewController = rootController
}
return true
In Sign up view controller:
@IBAction func actionSignup(_ sender: Any) {
let appDelegateTemp = UIApplication.shared.delegate as? AppDelegate
appDelegateTemp?.window?.rootViewController = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateInitialViewController()
}
MyTabThreeViewController
//Remove user credentials
guard let appDel = UIApplication.shared.delegate as? AppDelegate else { return }
let rootController = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "WelcomeNavigation")
appDel.window?.rootViewController = rootController
control drag From View Controller to View Controller
You will need to give an identifier to your segue:
Perform the segue:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:@"yourSegue" sender:self];
}
Now here is the thing, this will just perform the segue, if you ever needed to pass some data to that view controller. Then you have to implement the following segue delegate:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Make sure your segue name in storyboard is the same as this line
if ([[segue identifier] isEqualToString:@"yourSegue"])
{
//if you need to pass data to the next controller do it here
}
}
Best Answer
Your trouble is because your tabViewController is embedded in the navigation stack that you initialise with your login screen.
you need to rearrange things so that each of your tab bar controller tabs opens to a new navigation stack.
What I suggest
your loginscreen should navigate to your tab bar controller with a modal/presenting segue, not a push segue. Remove the navController that encloses the loginscreen, you don't need it (well, even if you keep it, don't use a push segue, use a modal segue, and you won't then be referring back to that navController's viewController stack from inside your tab bar).
embed each of the first viewControllers in your tabViewCOntroller inside a separate navController.
Now you can push segue within your tabViewController's tabs.