Creating a framework delegate

- [Narrator] Now let's talk about how to handle…events that occur inside of your framework.…If you've worked with IOS Development to this point,…it's very likely that you've encountered…the use of a delegate,…which gives you the functionality…to call back to one object from another.…We're going to follow the same kind of logic here…by implementing a delegate that's inside…of your camera controller to call back…to the application using your framework.…Go to the line that says import AV Foundation.…Hit return, and underneath it type public protocol,…camera, controller, delegate.…

You'll notice that we specified it to be public…so that the application that uses this framework…has access to this protocol.…We're going to type one function…called func, cancel, button, tapped,…and the parameter will pass in is the controller…on which the cancel button was tapped.…Think about the use case here.…When we're dealing with a cancel button being tapped,…you need to make sure that that's a button occurs on the UI,…and you want to have custom logic…