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All right.
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In this lesson, we're going to be installing CocoaPods using something called the Terminal.
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Now, the installation process requires issuing two commands into the Terminal: sudo gem install cocoapods
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and pod setup.
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The only other thing you need is a stable internet connection and a little bit of patience.
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So if we go to the CocoaPods homepage, there's a handy Getting Started Guide, and it tells you, "What is
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CocoaPods."
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How do you install CocoaPods?
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And a really good resource I recommend is taking a look at this video that Google has created as a part
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of "The Route 85 Show" which is a bunch of resources that they've compiled or tutorials for iOS development
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which is kind of strange coming from Google Developers.
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Now, admittedly, this video has some pretty cheesy jokes but, you know, if you just bear with it, there's
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actually quite a lot of good information that they are giving you on how CocoaPods work, what it is,
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and how to install and use it.
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Now, I'm also going to walk you through how to install CocoaPods for the first time.
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The first thing to do is to go ahead and open up something called Terminal.
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Now, if you have a favorite Terminal, then go ahead and use that.
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But for everybody else who's never heard of what a Terminal is, then simply just click on the spotlight
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icon and search for Terminal. Terminal is an application that gets installed by default along with
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macOS,
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so you should all have it.
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So double click to open it. And at this point, you should see a window appear that looks like this or
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like this, or like this.
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The important thing to notice is that no matter how the Terminal looks, it always has something called
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a prompt. The prompt will look like a dollar sign or percentage sign. And it's after this prompt that
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you can issue commands to your computer.
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Now, if you've updated from an older operating system to macOS Catalina, then you might be greeted with
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a message like this. If you don't see this message, then don't worry,
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simply skip ahead to the next timestamp.
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But if you do see this message, then you can follow along with me.
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The reason why we're getting this message is because Apple has updated the shell in the Terminal to
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something called zsh.
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So all that you have to do to get rid of these errors and to use this latest version is to simply copy
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this line.
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So in between the single quotes, not including the single quotes, hit command C, and then go ahead and
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paste it down here with command V.
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And what this line of code will do once you hit enter is it will simply change the shell from what used
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to be bash to this new thing called zsh.
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So it's going to ask you for your password and you should be logged in in the admin account to do this.
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If not, go ahead and log out and log back in as the admin account for your computer.
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So I'm just gonna go ahead and type my password, and notice how when you're in Terminal, when you're typing,
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it doesn't show anything, it doesn't show what you're typing, it doesn't show little sort of asterisks.
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You have to make sure that you're actually typing the right thing. And then hit enter.
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And if you've typed in the right password, it will just go ahead and allow you to continue.
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If you haven't, it'll tell you that you've typed in the wrong password, and you have to try again.
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So this blind typing takes a little bit of work to get used to, but I'm sure you'll get there eventually.
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And now I'm going to write the command clear in here to give me a blank slate to work with. 
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There are only two commands that we need to issue in Terminal to be able to install CocoaPods.
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And the first one is sudo gem install cocoapods.
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So make sure that you're spelling it exactly the same as you see here.
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If we head back over to the CocoaPods Guide, you can see that we need to use this line of commands after
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the dollar sign which is the prompt.
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And back in our Terminal, that's what I'm going to write sudo gem install cocoapods, and then hit enter.
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Now, it's going to ask you for your password.
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And this is the password that you're using to log in to your current account.
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And remember that that account needs to be an admin account.
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It needs to have admin permissions. Because, otherwise, even if you enter the password, it's not going to
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work.
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So just like when you install big applications onto your Mac, you always need to have an admin account
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to do that.
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So if you're not logged in as the admin, make sure that you log out and log in with the admin account
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before you proceed.
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So, now when we write our password, notice how it's actually not going to show you any asterisks or any
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indication that you're typing at all,
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so you have to do it blind.
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So let me just put in my password and you'll see that nothing has happened.
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But once you're sure you've typed out your entire password, then go ahead and hit enter.
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Now, as long as you've got your password correct, then it should start fetching and installing CocoaPods.
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Now, depending on your internet speed, this can take anywhere between just now you saw a couple of seconds
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to 5, to 10 minutes.
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So just be patient and wait until you see your prompt again, and you see this percentage sign, as well
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as a flashing cursor which tells me that it's ready to take new commands again,
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so that means it's done with the previous thing that you asked it to do.
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So be patient and just let it work its magic.
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So, now that we've installed CocoaPods and we've got nine gems installed, we've got no errors reported
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anywhere,
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then we're ready to proceed on to the next step. And step two involves the command pod setup. And at the
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end, we're going to add the flag,
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--verbose.
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And what this does is it's going to pull down what's called the master repository from CocoaPods which
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lists all of the available CocoaPods, the same ones that you can find in search on cocoapods.org,
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as well as their latest versions and how to get hold of them.
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So this process can take quite a while even longer than the previous step.
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And that's why at the end, we've added this flag --verbose,
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so that it tells us what's going on
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each step of the process, so it doesn't look like it's just stuck.
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But word of warning, this is gonna take a while,
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and, again, it requires pretty reliable internet.
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And if it fails, just try it again until you get a success message, and you see your prompt again.
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And that completes the setup.
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There's only one thing left to do.
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Check if everything is actually working and if installation was successful.
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So to check to see if your setup properly with CocoaPods,
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I want you to enter the command. So after your prompt,
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be it a dollar sign or a percentage sign,
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go ahead and type pod --version.
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So this is two hyphens and then version, and there should be a space between the pod and the first dash,
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and then go ahead and hit enter.
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Now, at the time of recording, my CocoaPod version is currently 1.8.4.
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So you should see a version like this or, hopefully, it'll be higher for you.
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So it might be1.8.5 or 1.9.something. But as long as you see this
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after typing the pod --version command, then it means that you've got CocoaPods successfully
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installed and set up, and you're ready to go.
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But what if you see an error message instead, say, it doesn't recognize the command pod or something like
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that,
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well, then I recommend trying the steps in the lesson again to install and set up CocoaPods.
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And if that doesn't help, then head over to the troubleshooting guide on the CocoaPods website. The troubleshooting
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page will show you some of the common problems and the possible fixes you can do.
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But in most cases, they should go through successfully without you needing to do anything else,
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although it'll just take some time. Now, with the setup out of the way, we can harness the true power of CocoaPods.
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So for all of that and more, I'll see you on the next lesson.