[MUSIC] Okay, so we've created a new blank project, and we have added the face tracker library framework to our project as well. So the next step is to add it into the user interface. The framework itself provides a special view controller called the face tracker view controller. It doesn't really provide any instructions on subclassing it or customizing it via code. So it's kind of a black box. So what we'll do is we'll have to kind of wrap it with another view controller so that we can communicate with it and control it on the screen. And that way we'll be able to instantiate this view controller and can control it and customize what's going on with this view controller. So, what we'll do is use the container view object in the interface builder and use that to actually add our face tracker view controller as a sort of sub-view controller of our main custom view controller. So I'm just going to go in here, into the Object Library, and search for container view. So what this does is if I drag it into, this is just my basic, blank View Controller that comes with the project, so if I drag it in there and drop it. What it does is it creates a sort of place holder container within my view controller that has a link, or a segue to another view controller. So this is special kind of segue called an embed segue. And what it does is that when it loads this initial view controller, it's also going to use this segue to load this other view controller and embed it within the original view controller. So this view controller here is just my sort of custom view control class. It's automatically generated and the other view controller is going to be. This is going to be the face tracker view controller. That's going to be the embedded view controller. So the first thing we have to do is just resize this container view so that it takes up the entire view of the main view controller. So I'm just going to drag it till I get all of those guidelines that pop up so it is taking up the entire view. And we'll just quickly add some constraints to make it full screens by adding missing constraints for that. So that adds the constraints that will make sure that this container view is always full screen to the edge of all parts of this window here, or this view controller. So the next step is to actually tell this system that it's going to be loading a face tracker view controller, not just a generic object here. So I'm going to click on my embedded view controller and go in here and go into the Class and make sure it says FaceTracker. Even if I just type the first couple letters, FaceTracker, it automatically auto-completes it to FaceTrackerViewController. But I also have to make sure I include a module name this time. So this is a little bit different than you might normally do because the FaceTrackerViewController is part of a separate module. It's part of that face tracker module that we've imported so I'm just going to make sure that I put in FaceTracker as the actual module. Okay, there was one last thing we have to do and that's give an identifier to this embed segue so we can identify it later in code when we want to actually access this view controller and call some methods on it. So I'm just going to give this a name here. It's an identifier here just call it FaceTrackerEmbed so that we know how to find this segue here when we need to.
