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So what can I gain in this exercise.

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You're going to develop an app that lets users play a very simple game and that is how fast they can

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tap.

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So you would have a timeout let's say for five seconds or 10 seconds or 20 seconds and the user has

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to top as fast as they can.

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And your app is essentially going to chance the number of the taps that they land.

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So tap really fast and count the time.

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That's the goal.

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Let's pause the video now and try it on your own.

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And once you're done or if you felt like you know you want to tag along with my solution or look at

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what I'm doing I'm going to pause now for a few seconds and then get the song

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OK.

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So when I go to school and when I start a new application called the top fast as you can imagine some

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parts of this I'm actually not going to explain because I'm thinking that you know what's happening

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because it's been a while that we are here.

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So I'm going to go ahead and add a you I view is I view.

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I'm going to kind of place it there.

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OK.

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So that's kind of there.

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I'm actually going to go ahead and make this a little bit of a different color then I'm going to go

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ahead and add a label.

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And when I'm doing this kind of exercises for you but I don't bother with the utterly out of things

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of the source because I kind of feel like you know how to do them.

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And also they're not really the goal of this lesson in particular.

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You know how to set your values.

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And here is that number counter that's the one that counts how many of them are there and this one is

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going to be my time counter.

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So something like that would do.

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Perfect.

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OK.

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So then I'm going to go in and say these three.

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They have outlets.

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This one I'm going to call the tap area.

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That's where we can top this one is going to be time table.

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This is how much time has elapsed so far and this is the number of the counts so counts labor or.

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Yeah let's call it top sleep.

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I think tops count but I would make more sense.

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OK.

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So we have all the elements that we need.

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And I know that they use an instruction is enabled.

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I'm actually going to disable it here so I can show you how to do it in the code even though it doesn't

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really matter.

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But so we can have a look at that and what a lot of you control and in here we have to do a few things.

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I'm going to write all of them down in honor of you Lord.

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We have to say what do they call the tap area not use any instruction enabled.

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Is that true.

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So that's the very very first thing we have to do.

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Then we have to have a timer to call in the time that has passed.

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We have to have a timer that counts that time and we have to have they count home any time we have stopped.

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So let's go ahead and add all three of these.

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I'm going to say we have a conference time which is obviously in danger.

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Currently we don't have value for it and then we have a timer and this is going to be a timer and that

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I have a count which is again an integer and doesn't have a value at the beginning.

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So current time counts the time Count counts how many times you tapped on the timer.

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Essentially time's up as the time goes through.

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Now here's what I'm going to do in my view with a lot of the very first thing I'm going to say every

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time we come in here make sure that the count is zero.

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Time or were they called the Koren's time is also zero.

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And then they start a Timelash and we do that by saying timer becomes a timer that is scheduled timer

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we enter.

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And the one that I want to use is scheduling timer 1 and let me get all of them in order so I know what

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they have to type some time into when I'm going to say it every cycle.

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Target is going to be in here.

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Let's select what I have to make sure.

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Right.

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We don't have that and then write this later use it for is national and repeats through and now the

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important thing in here is where does this time go.

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Every one I can go to every So.

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So that's going to be a method that I'm going to call it let's say count it or count time.

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It's going to be a function Count.

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Count time and my chance time is the one I'm going to use in here.

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You know the moment they paste this I'm going to get a warning error.

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They're saying that it has to be exposed as an objective c so object C and this is swift for mother

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the previous fiefs they used to deal with it differently in the previous issue with I should say something

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like this.

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You could say in the name of your your function but that really doesn't work anymore.

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So let's go back in my chance time I'm going to go ahead and say the one that is called Our Time label

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time label that text and becomes essentially any value that you find in the current time.

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Now this is obviously going to be very crude if you want to make it look pretty you could actually do

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your own formatting.

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You can afford it.

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It looks like it does 00 the minute sign on a column and then number three I can sign it.

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I'm not going to bother with that.

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I'm going to show it to you sometime in the future.

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But for now this would very much do the work for me it only shows me the exact second that you are on.

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And the warning that we have is because crying's time is a function an optional value.

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So I'm just going to go ahead and drop it.

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And then of course every time we come in here we have to say Cronin's time plus a call 1.

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So they have to add that all the time every time that we come in here.

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Now here's the thing.

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We shouldn't keep doing this forever because we said are essential is going to work for five seconds

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or 10 or 30 or any number that you decide.

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So for that I'm going to say if time is still below 10 for instance do all of these right and that's

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perfectly fine otherwise.

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I want to say Taimur daughter in law dictates and then do your own thing to move to a different view

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control her show a little warning sign or whatever that you want to do and your user knows that time

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is up.

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But for now here's what we want to do.

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Maybe you want to have a boolean value that is a game of status let's say status.

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The beginning it is true.

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And then here if that time passes and reaches that status becomes a false value or anything of the sort

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that you want to imagine but you have to find a way to announce to you or use it that the time has actually

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passed you have reached the time that you can play the game anymore.

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So let's keep it here.

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Then we move on to adding our actual function which is when we land a touch or when a touch ends which

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we should calculate the new count.

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So I'm going to go in here and say I have a Hatcher's in that method and in my pictures and I want to

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do something very simple.

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I want to say if touch does not count is 1.

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So I only count it when there is absolutely only one touch on that device.

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I'm going to say in that case let's get my touch just like the last times touchiest first and then say

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if my touch data view is what we call it tap area if it is a top area then that is when you have to

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count up by saying count plus equal 1.

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And of course you want to see the value of it tap's count labor and then tax count the text becomes

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whatever value we have in the actual counts.

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So count I was off to make my count to become mine on dropped value.

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So we do that because Count is an optional one.

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And now everything should be working the way we wanted it to be working.

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Let me go ahead and run this application.

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And now the timing is starting to count to three.

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And then I can and I can count obviously I'm guessing I do this faster on the mouse and you probably

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wouldn't be able to do it as fast.

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And once we got to nine it stopped counting maybe this value should have been a smaller or equal 10

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and you might want to have a system to format this text better but the overall thing is you'll start

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at tight timer between a certain time and until the time reaches a certain value.

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And within those two APBA the same Surely you start counting and for now I can still count up even though

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the timer has stopped.

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That's why I suggested that you probably want to add something like Stathis in here that doesn't let

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me do that.

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Let me go ahead and quickly add that one.

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I'm going to say.

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Let's say play.

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OK.

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And that's going to be currently true.

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And I'm going to say play vidit become false.

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If the timer reaches there's so so far we know at the moment we reach 10 seconds.

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Play will become fots.

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So how does that help pause.

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I'm going to go to touches in it and say touches touch that one and play.

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So only do this thing you feel are in the play mode.

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If you another the play more don't do any of these things.

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So let's run up again.

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And these are really simple fix this so much you can do.

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That's why I don't want to go through every single detail.

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You can do a lot of these things on your own.

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So now my time is counting up.

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I have four.

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I can tap tap tap tap tap tap tap tap tap.

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Twenty four five six seven and then you starts at 10.

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I couldn't tap anymore.

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It got stuck at 41 and that's simply because now play is false.

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So that's about that there's so much you can still fix on this.

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Our playing style is one of the things that happens and that's a logical error is that I wanted this

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to happen only for the first 10 seconds.

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But I know I'm actually working up until the 11th and because this runs at the tenth time and it becomes

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valid and then one more second passes before this thing becomes false.

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So that's something you might want to address.

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The other thing is right at the beginning of the app we don't see the timer showing us zero.

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You might win at least not until this becomes a real application.

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Obviously you need to write a lot more code.

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Like what 60 lines of code.

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You'll probably need to reach it to about 100 150 before everything is taking care off and everything

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is at risk.

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Another thing is probably you want to allow you to use it to start the game on their own.

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It's never a good idea to start the game on a view that lot simply because there might be a little bit

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of a delay until the view did last.

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And the view did appear to happen.

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So maybe you want to have a little button that says begin.

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And then when they first to begin they kind of start tapping.

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So on and so forth there's so much that you know you can do about it.

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So with that in mind let's move on to on.