故事板更改未在iPhone Simulator中更新

Question

It is a few days that I have this problem and I have not managed to solve it..

I completed a storyboard for iPhone 5, now I've created a new storyboard to iPhone 6, I copied the various ViewController from the storyboard for iPhone 5 and I made some changes.

Now i run my app on iPhone 6 Simulator and no change I've made is visible!

I attach some screenshot:

for example I change the background color of UICollectionView in Blue, but this is the result:

I tried to Reset Simulator, delete DerivedData folder, restart Xcode, delete Storyboard 6 and re-add, I do not know what else to try, I never encountered this kind of problem

I tried with Xcode 6.4, now I upgraded to Xcode 7 but the problem there is still...

EDIT :

in AppDelegate I grab the right storyboard in this way:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

 _storyboard = [self grabStoryboard];

 //login-registrati view
lvc = (LoginController *)[_storyboard instantiateViewControllerWithIdentifier:@"login"];

tabbarController = (UITabBarController *)self.window.rootViewController;

if (isLogged == YES) {

    self.window.rootViewController = tabbarController;

}
else {

    self.window.rootViewController = lvc;
}

[self.window makeKeyAndVisible];

...
}

- (UIStoryboard *)grabStoryboard {

int screenHeight = [UIScreen mainScreen].bounds.size.height;
UIStoryboard *storyboard;

switch (screenHeight) {

        // iPhone 4s
    case 480:
        storyboard = [UIStoryboard storyboardWithName:@"Main3.5" bundle:nil];
        break;

        // iPhone 5s
    case 568:
        storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        break;

        // iPhone 6
    case 667:
        storyboard = [UIStoryboard storyboardWithName:@"Main6" bundle:nil];
        break;

        // iPhone 6 Plus
    case 736:
        storyboard = [UIStoryboard storyboardWithName:@"Main6+" bundle:nil];
        break;
}

return storyboard;
}

I know that the Simulator get the right storyboard is that in some ViewController I can see the changes, but if I change the ViewController related to UITabbarController that is the root view controller, there isn't changes on simulator...

Answer 1

Try to create a property for UIViewController:

@property (strong, nonatomic) UIViewController *initialViewController;

and do this after you get the new storyboard reference:

_storyboard = [self grabStoryboard];
self.initialViewController = [_storyboard instantiateInitialViewController];

and then change your rootview

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = self.initialViewController;
[self.window makeKeyAndVisible];

Edit:

I even tried your way. And it worked too.Please make sure you have set the view controller identifier in xcode and it matches to "login"

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
lvc = (LoginController *)[_storyboard instantiateViewControllerWithIdentifier:@"login"];
 self.window.rootViewController = lvc;
 [self.window makeKeyAndVisible];

From the documentation:

instantiateInitialViewController

Instantiates and returns the initial view controller in the view controller graph.

Typically, you use this method only when transitioning to the initial view controller in a different storyboard file.

Edit Ilario:

I accepted your answer because it put me in the right direction, I solved changing in this way:

tabbarController = (UITabbarController *)[_storyboard instantiateInitialViewController];