Hi there, I'm for Pason.

The instructor whose course you'll be taking in just a second.

Sorry to interrupt you right as you're about to get started but

I have an important announcement to make.

If you've already heard me say this feel free to skip.

The content you're about to take was recorded using Swift 2.0 and Swift 2.3.

In September 2016, Swift 3 was released.

And Swift 3 is a big change from Swift 2.

If you're just getting started, you'll be downloading Xcode,

the software you'll be using to program from the Mac App Store.

The latest version of Xcode is 8.0, and it uses Swift 3 by default.

This is important to know.

Because when using Xcode 8, the version of Swift you will be writing with and

the version in the video that you will watch are different.

And this means that code you see in the video, although correct in Swift 2,

may not always work on your computer.

For those of you who've been taking content from before Swift 3 was released,

this is still important to be aware of.

Because you may have updated Xcode or depending on how your machine is set up,

Xcode may have updated automatically.

Unless you prevented that update, you are also now using Swift 3 by default.

So what does this mean for you, the student?

We at Treehouse are working on getting all this with content updated for

Swift 3 as soon as possible.

In the meantime, if you want to learn Swift and iOS development immediately, you

can still continue to take this content but you'll have to work around the issue.

There are two ways that you can do this.

The easiest way is to install Xcode 7.3 on your computer.

You can't do this through the Mac App Store because you'll only get the latest

version there.

Instead, you need to go through Apple's Developer Portal.

In the teachers notes section of this video,

I've provide a link to download Xcode 7.

To access this download, you will need a valid Apple Developer account.

You can have as many versions of Xcode on a single machine as you want.

So if you already have Xcode 8 installed, you don't have to get rid of it.

Just make sure that you will always use Xcode 7 for these courses.

If for some reason you don't want to go this route, there is another way.

Xcode 8 uses Swift 3 by default, but it can work with Swift 2 as well.

It can only do this however,

if you open a file that was created in Xcode 7 and uses Swift 2.

When you open this file in Xcode 8,

it will prompt you to convert the project to the latest syntax of Swift.

You can select not to do this and continue writing in Swift 2.

In this way, you can take Swift 2 content on Treehouse

with just a single version of Xcode installed.

To go this route however, you will need files that were created in Xcode 7.

I've provided some empty project files below,

which you can grab through download links.

And you can use them as your starting point.

This is pretty cumbersome though.

So if you do it,

just remember to always decline to update the project to the latest syntax.

I hope this helps.

In the meantime, I'll get working on getting you content in Swift 3.

Have fun learning.