TTPhotoViewController - detecting when an image has fully loaded

[Andy Waite]

I have extended TTPhotoViewController and overridden loadView to add
an additional button the toolbar, to allow users to save an image to
their photo library. I want to set this button to disabled initially,
and then enable it once the full size image has fully loaded. However,
I can't work out where to the enabling code. Is there some callback
method which I could override?

Andy

[uprise78]

you need to set yourself as the delegate for the TTURLRequests