I’m trying to set up a UIViewController than can host a number of different 
UIViews as long as they adhere to a given protocol.  I’ve worked through 
getting things set up to make the compiler happy, but I’m getting a runtime 
error loading the view controller from the storyboard.  Below is the relevant 
code.

How do I specify the class in the storyboard so it will load correctly?  Or 
perhaps there’s a different way to construct this all so it will work?

protocol MediaItemView {
}

class PhotoMediaItemView : UIImageView, MediaItemView {
}

class VideoMediaItemView : VideoPlayerView, MediaItemView {
}

class MediaItemViewController<T where T: UIView, T: MediaItemView> : 
UIViewController {
        private var     currentMediaItemView :T?
}


let     mediaItemViewController =
                
self.storyboard?.instantiateViewControllerWithIdentifier("MediaItemViewController")
 as!
                        MediaItemViewController<VideoMediaItemView>

Storyboard has a view controller with the Class set to "MediaItemViewController"

2015-12-03 22:07:23.966 Media Tools[14143:276368] Unknown class 
_TtC11Media_Tools23MediaItemViewController in Interface Builder file.
Could not cast value of type 'UIViewController' (0x10d1dfd60) to 
'Media_Tools.MediaItemViewController<Media_Tools.PhotoMediaItemView>' 
(0x1193fc038).

-Stevo Brock
 Owner
 Sunset Magicwerks, LLC
 www.sunsetmagicwerks.com
@SunsetMagicwrks
 818-478-9758

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