Fun With Selfies: Facetracker view controller

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Из курса от партнера University of Toronto

Build Your Own iOS App

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University of Toronto

Build Your Own iOS App

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Курс 4 из 4 — Specialization iOS App Development with Swift

In the Build Your Own iOS App capstone you will expand your repertoire of additional features and more advanced functions that may be implemented within the iOS environment. You will refine your development skill set and will apply your accumulated skills over the entire specialization series in an applied application development capstone project. This particular course is project based and structured around you building a high quality app as a capstone to the specialization. Currently this course is taught using Swift 2. The team is aware of the release of Swift 3 and will be making edits to the course in time. Please be aware that at this time the instruction is entirely with Swift 2.

Из урока

Facetracker Library

Get the face detector library running and understand its notation/connections

Fun With Selfies: Add Facetracker Framework6:02

Fun With Selfies: Facetracker view controller3:49

Познакомьтесь с преподавателями

Parham Aarabi
Professor
Department of Electrical and Computer Engineering

[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.

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