iOS How to go to Previous to Previous View - ios

Question

I have a situation where I want to go from Previous to Previous view.
A MainView calls modal CWViewC calls modal CRViewC & that calls modal CRDViewC - on a action event in CRDViewC I need to return to CWViewC & update a component of it.
I want to use navigationController in my app, but am not able to set it, hence right now am not using it at all. I also am scared to play with Segue's also thinking that it might affect the compatibility of the app :(. I searched on net for similar situation but can't find a solution.
I could think of sending any sort of notification to CWViewc from CRDViewC. But again how to implement it in both respective classes & how to get rid of (I mean close) CRViewC then.
So please suggest and guide me for the same to solve the problem.
Any help is highly appreciated. Thanks.
EDIT :
My req was I have to call LoginVC prior & my main scrn is MAinTabVC. So I have made my app as TabbedTemplate & I call my LoginVC from AppDelgate & on when logged in successfully, from AppDelegate my MainTabVC comes up. This is how I call my login :
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
// Get the StartupData properties from device
MC_Utility *utility = [[MC_Utility alloc] init];
self.theAppDataObject.startupData = [utility retrieveLocalData];
NSLog(#"READ Loigin On Launch - %#", self.theAppDataObject.startupData.loginOnLaunch);
utility = nil;
// Show Login view if not logged On
if (!self.isLoggedIn) {
[self showLoginScreen:NO];
}
return YES;
}
-(void) showLoginScreen:(BOOL)animated {
// Get login screen from storyboard and present it
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
LoginViewController *loginViewController = [storyboard instantiateViewControllerWithIdentifier:#"loginViewController"];
// Show Login
if (theAppDataObject.startupData.loginOnLaunch.boolValue == true) {
NSString *email = #"dylan#antila.co";
NSString *pswd = #"t4Wzpg4OQ5q8ZNVDPPo7wg==";
[loginViewController startLoginProcess:email :pswd];
} else {
[self.window makeKeyAndVisible];
[self.window.rootViewController presentViewController:loginViewController animated:animated completion:nil];
}
}
Other all views that I normally show using such code :
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
MC_ChatWindowViewController *chatWindVC = [storyboard instantiateViewControllerWithIdentifier:#"chatWindowVC"];
[chatWindVC setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentViewController:chatWindVC animated:YES completion:nil];
In my AppDelegate, I had tried to call mainTabVC, but wasn't successful. So stuck to original code. Tried several ways thru few tutorials also, but couldn't do it. I am a newbie in iOS development & am not finding comfortable yet to work with navControllers.
I have embedded NavController in LoginVC thru storyboard.
CODE Added in MAinTAB .m
#implementation MC_MainTabBarController
bool isLogged = false;
-(void) showLoginScreen:(BOOL)animated {
NSLog(#"Calling Login from MainTab");
// Get login screen from storyboard and present it
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
LoginViewController *loginViewController = [storyboard instantiateViewControllerWithIdentifier:#"loginViewController"];
[loginViewController setModalPresentationStyle:UIModalPresentationFullScreen ];
[self presentViewController:loginViewController animated:YES completion:nil];
/* AUTO LOGIN
// Show Login
if (theAppDataObject.startupData.loginOnLaunch.boolValue == true) {
NSString *email = #"dylan#antila.co";
NSString *pswd = #"t4Wzpg4OQ5q8ZNVDPPo7wg==";
[loginViewController startLoginProcess:email :pswd];
} else {
[self.window makeKeyAndVisible];
[self.window.rootViewController presentViewController:loginViewController animated:animated completion:nil];
} */
}
-(void)viewWillAppear:(BOOL)animated {
if (isLogged == false) {
[self showLoginScreen:YES];
}
}

Answer 1

As you mentioned segues, can I safely assume you're using storyboards? If so, get your first view controller (the one with MainView) in the storyboard file, go to the Product menu in the menu bar and select Embed In>Navigation Controller,as shown in this screenshot:
Then, change those segues between your view controllers to be Push rather than modal, so the one from mainView to the CWViewC will be Push, then the one from CWViewC to CRViewC will be Push and so on.
The views won't be modal, but this is a much more natural way of progressing through a stack of views.