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What's up guys I'm Jacob Bledsoe it slopes dot com and in the last lesson we got that really cool swipe

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button work and so that was exciting.

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This time we're going to work on getting the location tracking We're going to start seeing the distance

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move and all that cool stuff.

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So we're going to be doing a lot of work still in the current run visi.

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And before we get started let's go ahead and just pull up our terminal and I'm going to create a new

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branch for less than 7

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right.

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And now we should be good to go.

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All right.

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So in our current run VC we got our Swype button all working.

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We also got the VC dismissing when when it is Swype So that's pretty cool.

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A few things we have to do.

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We need the C-L location manager and all that good stuff.

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So we're going to have to kind of copy things that we did over here on the begin run VCs.

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So we're going to need to make sure that there is authorization and all that and then we're also going

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to have to set the manager delegate and view will appear because like I said before if we just do it

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in feuded load view to load won't get called when we go back to like the bigger run visi.

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And it might not get called when you go back to the current run.

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Once the app's been running you can't really guarantee if the VC will stay in memory or not.

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So we're going to want to set our manager delegate in our view will appear just like we did on the begin

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run VC.

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And then we're also going to want to do the authorized wind and use extension for C-L location manager

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or delegate.

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So let's go ahead and hop over to our current run VC again and we need our view will appear.

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Yep view will appear.

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So if you just start typing view will appear hit enter and now we want to just go ahead and say manager

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that delegate equals self and I'll probably yell at us

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it wants us to Casta.

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Yeah.

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But once we add that extension that'll go away.

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Let me just do some spaces so you can see what I'm doing.

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All right so now if do an extension of current run.

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VC.

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And we wanted to inherit from the C-L location

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manager

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see location I don't know why it's not auto complete in C-L low location manager delegate

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and then we also want to undeclared type 3.

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We hope that

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out.

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So we need our map kit comported import map kit.

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OK.

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There we go.

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And now this should be recognized there we are.

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And we need our DID change

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there we go hit enter.

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So and then we basically just want to check to make sure we're still authorized to track the device

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and if not we're going to call the function on our location Visi check location off status and that

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will take care of that for us.

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So just do.

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And if status equals data off when in use and we want to

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just check our status here check location status and that will call that function.

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We already wrote and prompt the user.

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Very cool.

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All right.

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So one more thing that we're going to need on this Visi is we need to know if the location changed so

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we can start keeping track of distance traveled.

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Right.

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So we need one more function from the C-L location manager and that is going to be did update location

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did update location and it's the second one right here.

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Right.

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Cool.

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No this is not right.

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We want update locations did update locations.

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There we go.

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We want to make sure that the location is in an array.

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All right cool.

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So with this going we could start

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calculating you know how often every time the location changes we can start updating and label and run

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this stuff.

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We did this all start at the location and the values and the operation.

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So we need to do something like that in our current run visi.

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So interview will appear.

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Let's go ahead and call a function called Start Run.

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And we have to create this function also.

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So down underneath view will appear.

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Let's go ahead and do phunk start Ron and then opening and closing brackets.

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And so obviously when we hit begin run button on the other run and we answer this we see we assume the

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run starts right away.

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So we can call it immediately right.

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And let's see in start run we need to say Manager dot start tracking and location start updating location.

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There we go.

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And couple other things I think in the delegate We want to make sure we set a distance filter.

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And so let's go ahead and do manager dot distance filter and set that to 10.

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And so that should be 10 meters and we can always tweak that number.

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But since it's running out we wanted to update quite often.

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So I think that is good for now.

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And so if we start tracking location that is good we should probably also since we're thinking about

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it maybe write a function for end run that we can call on when you swipe and the first things first

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is we're going to want to say Manager dot stop updating location.

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All right.

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So that takes care of that.

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And let's see what else do we need.

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I think that is good for us to start.

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Maybe displaying some labels.

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So we also have to hook up all of our IAB outlets so let's open up our assistant manager or assistant.

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I always forget the name of the editor.

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All right.

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And we have our current run we see if you don't see that there.

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Go ahead and just manually find it in your control or folder.

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Current run.

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And then on the left side here we'll open up our view controller or our storyboard.

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Let's get some space here.

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OK.

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And Syria just think I'm talking to her.

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Turn that off OK.

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So we need our duration label.

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So go ahead and control drag over right underneath the slider and we'll call this duration level.

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Connect that and then our pace label controlled drag and we'll call this our pace label connect and

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then our distance makes sure you just highlight the numbers not the miles label and control drag and

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we'll call this distance label.

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All right.

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Great.

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I think we.

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Let's go ahead and connect pause button right away.

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Control drag pause button.

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Right.

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And then we should also create an action for our pause button.

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We're going to need that and I'm going to put it right above our end runs.

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Wiped so control drag right there change the connection type to action and we'll say pause button pressed

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and then I'm going to give this some space as some space here.

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Save that.

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OK.

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And we can close our assistant editor and let's go back to the current run we see an all the way down

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to.

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Did update locations and we can start updating our locations now and get something printed to our distance

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level.

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OK so this is going to get cold every time the locations update.

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Right.

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And since it's an array of locations we're always going to want to compare

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like a last location to the new.

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So whatever got appended or added to the end of this array.

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So we're going to just constantly be adding to like a distance variable so let's go ahead and slide

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up to the top and create some variables that we're going to need.

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We're going to need three variables for keeping track of the running distance.

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One variable is going to be start location.

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We want to know where that is.

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And that's going to be C-L location and we're going to force unwrap it because if this is nil our app

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is pretty useless.

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And then we're also going to need a last a location and that's going to be C-L location as well.

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And then we also need a variable for run distance.

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And this is going to be of type double and we'll just set it to zero for now.

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And actually we don't have to even declare it let's just set it to zero point zero.

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OK.

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So that's our run distance and what we're going to do is just constantly add to this.

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And we every time we enter this view controller we want this to be zero because we're starting a new

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run.

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So now we can go down to the location did update and a few things like We want to.

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So if the start location is nil we want to set the start location right because it's going to be nil

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off being initialized.

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So if start location is equal to nil which is when we enter the VC we want to set the start location

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to the locations array but we want it to be the first first entry.

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So go ahead and say Dot first and that's going to grab the first location that is in our locations array

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and set it to the start location.

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OK.

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So if it's not nil that means they're run already started so we can do an else if and we can let location

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location equal equal locations

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locations that last.

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So if start location is not nil this function just got cold because the new location got added to the

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array so we want to grab the last location and that is the amount of space that the device just moved.

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So with that location we're going to want to say our run distance plus we want to add plus equals our

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last location

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and that will now increase our run location.

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And then we also want to set our distance label that text and we want this to be our run distance.

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So let's go ahead and just do the opening and closing quotations and go ahead and do a backwards slash

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and then opening and closing parentheses and just pass in the run distance variable.

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And what are we getting yelled at for we probably have to cast this as

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how it's location we have to grab the distance out of it and the C-L location would be our variable

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location here location not locations.

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All right.

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So with this done we should now be able to see

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our label move.

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And let's see our last location.

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Did we ever set the

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location.

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Trenton

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so we're finding the distance from our last location with the new location.

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And then after that we need to set the last location to what the new location was so it updates Otherwise

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it's always going to think our last location is is nil or zero on update.

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So let's go ahead and say last location outside of the F equals locations that last and that will constantly

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update the last known position of our user.

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So now if we run this on the simulator

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we should see Cool's we should see the level update in and before we press start.

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I'm going to go ahead and go up into de-bug And if you go down to the locations you can actually have

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a fake run going.

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So we're going to select city run and our little dots going to start running around the Apple campus.

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So now if we start run our distance label is update and we'll get that.

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How cool is that.

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Now obviously you're like well what's going on here.

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So the default link or I should say the default units are meters.

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So that doesn't really help us for miles.

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So we're going to end this lesson here and I'm going to show you how to do some cool class extensions

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so we can extend like the double the doubles class and we can actually start formatting this stuff live

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right on right as it updates.

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And if you guys want to go ahead you should give this a try before you start the next lesson and try

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to get this to display miles and we are going to do we are going to have it round to the nearest hundredth

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place.

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So you know so you can see quarter miles and all of that good stuff.

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But we don't need all these decimals it's a little crazy.

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So that's pretty cool.

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We got location updating.

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So before I end this video let's go ahead and open up our terminal do a get ad period a commit dash

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em and say

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runner location updating to label or whatever you want and that's pretty cool.

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So I will see you guys in the next lesson.