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Bryant, it is time to start sending data to Firebase, so what we're going to do here is start to listen



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to this text field.



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When the user enters a message, we're going to do this by having a UI text field delegate.



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So this is going to listen to changes in the text field.



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To set this up, we're going to have the reference to the message TextField going to set the delegate



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to self.



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So that should take care of that.



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Now, this delegate, we're going to have to obviously do something, aren't we?



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So this is my finished code here.



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Let's check out our TextField should return.



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So let's put it perhaps under fire based.



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Now, what we're doing in the TextField should return is this is part of the delegates, so when something



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changes in the TextField, i.e. you type something and then you press enter, what happens is this gets



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fired.



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What we're going to do is check the count of this particular textfield, as in are there enough characters?



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If it's less than one, which means there's nothing, then we're going to say, hey, you can't send



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that the thing over that, then you are fine.



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We are going to create a data object.



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This data object is what's going to fit into our FIREBASE database.



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So it has a text field which contains the text from the text field.



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OK, so we're just using these constants to name things so we don't get a a copying error somewhere



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in our own code.



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Then we're going to send the message which we haven't explicitly set up yet.



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So I'm just going to comment that out.



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We're going to print something to ourselves so we can tell ourselves with doing something as a developer.



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And then finally, if we so wish, we can clear the text field.



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Let's go ahead and drop that into utilities.



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So.



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There's our clear textfield now, the reason I put this into utilities is because we might have to do



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it in other places with a messaging app.



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You could imagine you're putting your name in, you're putting the time in.



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You're doing a whole bunch of things.



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You might want to clear the text field quite often.



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So I'm just going to pass it, the reference to the text field and that is going to clear it so that



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I should now go away.



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Going out.



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Shoo, shoo.



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Well, it'll get rid of itself eventually.



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OK, so this is hooking up to the text field so we can tap in to what's going on with the text.



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And then in the next section we're actually going to send that firebase message.