iOS / xcode / objective-c：如何在注册后实例化视图控制器

Question

After a successful sign up, I want users to go through a process where they provide photo etc. Similar code to that below worked to load the login page but code below is not working to load a separate view controller in storyboard "newuser".

Would appreciate any suggestions on how to fix.

- (void)presentNewUserInterface
{
    UIViewController* rootController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"newuser"];
    UINavigationController* navigation = [[UINavigationController alloc] initWithRootViewController:rootController];
    self.window.rootViewController = navigation;     
}

Answer 1

Two variants:

1. Replace window.rootViewController with your next view controller. Do it on AppDelegate class.

2. Present new view controller from current root view controller. Do it in your sign up view controller.

The lack of the first method is no transaction animation. So second method is preferable.

Answer 2

Instead of:

- (void)presentNewUserInterface
{
    UIViewController* rootController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"newuser"];
    UINavigationController* navigation = [[UINavigationController alloc] initWithRootViewController:rootController];
    self.window.rootViewController = navigation;     
}

Try:

- (void)presentNewUserInterface
{
    UIViewController* rootController = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"newuser"];
    UINavigationController* navigation = [[UINavigationController alloc] initWithRootViewController:rootController];
    [self presentViewController:navigation animated:YES completion:nil];    
}

You aren't presenting your new navigation controller in your example. Is there a particular reason why you would be trying to replace your rootViewController? That shouldn't be needed. My example should be sufficient for displaying your next flow in the user sign up process.