Unrecognized selector for ViewController inside Container View

Question

First, here's the basic setup of the Storyboard

UIViewController > View > Container View -> UICollectionViewController

The embed segue between the container and the UICollectionViewController is "SegueA".

Now the target UICollectionViewController is subclassed with CustomCollectionVC.h.

And CustomCollectionVC has a public method:

- (void)updateCollection:(NSArray *)data;

The encompassing UIViewController needs a reference to CustomCollectionVC so:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if([segue.identifier isEqualToString:@"SegueA"])
    {
        customCollection = (CustomCollectionVC *)segue.destinationViewController;
    }
}

And then, at a later point (after some data has been loaded), we call:

[customCollection updateCollection:data];

However, at this point, I get the unhelpful error of:

-[UICollectionViewController updateCollection:]: unrecognized selector sent to instance 0x10bc73ef0

If this means that customCollection is not being cast properly then what am I doing wrong inside prepareForSegue?

I've seen numerous folks ask about how to reference views inside containers and they all use this method.

Any help would be greatly appreciated! Thanks!

Answer 1

ok, turned out to be a very simple problem. As Philip Mills, rdelmar, and Ivan Lesko point out above, I had forgotten to set the CustomCollectionVC in the Storyboard. Damn.