Question

I’d like to go back to my root view from within a class method of view 1. When in an instance method of view 1, i would just say

[self.navigationController popViewControllerAnimated:YES];

but since self doesn’t apply in a class method, I am wondering how to accomplish this. Pertaining to the illustration below, I am currently in a class method of View1Controller.m and I’d like to get back to Rootview. Thanks.

Answer 1

You can declare another method:

-(void)closeThisViewController
{
    [self.navigationController popViewControllerAnimated:YES];   
}

Then use NotificationCenter:

[[NSNotificationCenter defaultCenter] postNotificationName:@"notif_closeThisVC" selector:@selector(closeThisViewController) object:nil];

Although as jonkroll said, you’re dealing with view controller stuff, we don’t understand why you would put view controller related code inside a class method.

Edit

Sorry bad code above.

I meant to say you can use NSNotificationCenter to post a notification:

-(void)postNotificationName:(NSString *)notificationName object:(id)notificationSender

Then in the same view controller declare a NSNotificationCenter observer:

- (void)addObserver:(id)notificationObserver selector:(SEL)notificationSelector name:(NSString *)notificationName object:(id)notificationSender

My brain was quicker than my fingers, so I kinda combined the two into one when I tried to explain the solution 😛

It should more like this:

// posting a notification with NSNotificationCenter
[[NSNotificationCenter defaultCenter] postNotificationName:@"notif_closeThisVC" object:nil];

In your viewDidLoad method somewhere (I recommend at the top), add this:

-(void)viewDidLoad
{
    // adding an observer with NSNotificationCenter
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(closeThisViewController) name:@"notif_closeThisVC" object:nil];

    ...
}

Hope that helps.