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Everybody what's going on this is Kayla with slopes dot com.

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And welcome to Section 5 where you're going to learn how to use observables and subjects in real life

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in a real application.

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And I'm going to show you the app we're going to build.

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It's pretty simple.

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But remember Eric Swift is sort of a new way of thinking about programming and SWIP So the app is simple

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and it's a good way to showcase some of the features of our swift and some of the things we can do.

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So I'm going to pull it open here and just show you a brief demonstration.

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Now in this app what you can do is you can select this text field here and you can type your name.

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Now what I've done is I've set up this text field to be an observable and the label has subscribed to

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the observable and now watch what happens when I pass in new information watch.

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Do you see how it updated there with my name just like that.

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So as I am changing the data that's going in the label is reacting to that data.

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It's really cool.

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Now when I click Submit I have set up this label there's a hidden label down here.

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I have set that up to observe what is in this text field and when I press submit I trigger that watch

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what happens.

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Boom it adds it in.

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It clears my text field and clears my label back to the default message.

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Now I could do another one Samantha and I could push submit and it adds it down there.

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OK.

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So you might be thinking wow this isn't that really that's not that impressive of an app and you're

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right it's not an amazing app that you would put on the App Store and reach the top of the App Store

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charts.

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But it does demonstrate some very important core arcs swift principles.

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So we're going to build this app so that you could pass in a name you can create observables of UI elements

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in X code.

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You can subscribe to then using other UI elements or alternatively you could use subjects like a published

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subject behavior subject or other types of observables.

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And we could also trigger actions using our swift.

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It's really really cool.

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So let's go ahead and let's dive into building the UI of this app in the next video and I'll see it

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there.

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Let's go ahead and let's head over to the next video where we're going to start creating our XCode project

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and installing the Orrick swift and our cocoa cocoa pots.

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And we'll explain what that is in the next video.

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I'll see you there.