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Hey everybody what's going on this is Caleb with Dev slopes dot com and in this video we're going to

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go ahead and write some help for functions that's going to basically assist us in flipping the lock

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status of a certain note when we tap the lock button and we're also going to go ahead and set it so

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that when we return back to the note Visi we can update the table view and show the cells with their

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new lock status.

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So let's go ahead and open our project like so.

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And let's go ahead and create a new Swift file in the helper's folder right click click new file swift

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file and let's call this helpers OK and press create.

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Now what we're going to do in this in this file is we're going to basically for one we're going to set

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a function called is note locked and that's going to return either true or false to help us determine

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if a node is locked or not.

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And that's what's going to help us know whether we should call Touch ID to pop up.

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We're also going to create a function called Lock status flipper that we're going to pass in a lock

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status and it's going to return the opposite.

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So let's write those functions now because they're really helpful for us.

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So first we're going to write phunk is note locked.

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OK.

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And we're going to pass in a lock status of type lock status and we're going to return a boolean.

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OK.

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True or false.

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Now if lock status was the one with the lowercase L is equal to locked.

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We're going to go ahead and return true because the note is locked right.

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That's our function.

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Otherwise we're going to return false.

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Ok just like that.

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So function.

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Done.

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Easy peasy.

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If the node is locked we're going to return true.

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Otherwise we're going to return false.

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Next we're going to create a function called Lock status flipper.

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That's going to allow us to pass in a lock status and it'll return the opposite for us.

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So go ahead and call phunk lock status flipper.

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We're going to pass in a lock status of type lock status and we're going to return a lock status.

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Now if lock status is locked we're going to return unlocked.

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OK.

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Otherwise we're going to return locked what's locked

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because if it comes in it's unlocked then we're going to return locked.

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Now this is going to help us to set the value of our note to have a new locked status.

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So let's think about what we're doing here.

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We go to main storyboard.

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A note is locked and it already shows up is locked.

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But let's say I select the lock note button.

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Ok we set up notes array.

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We set the note that we selected we set its lock status to be equal to locked.

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But it's a little more elegant to call our lock status flipper.

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Let's build to make sure we get access to that.

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Locks that is flipper and we'll pass in.

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Note that lock status.

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OK so whatever the status of the note is it's going to flip it.

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And in our case it's unlocked so we're going to return locked.

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Pretty cool.

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So now we can successively lock our notes.

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But what we need to do is set up our note VC to reload the table view after we do that because remember

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when we tap locknut it dismisses the view.

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And so in view will appear if you will appear call super dot view will appear pass in animated.

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And what we're going to do is we're just going to go ahead and call table view reload data and that'll

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reload all the cells that will reload all their data that's been set and it should show a locked note.

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So let's go ahead and try it.

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Let's build and run.

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Let's see how we did.

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And then we're going to be able to go ahead and head over to the next video where we're going to be

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able to test if a node is locked or not.

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Pretty cool stuff.

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So let's select a note and when we click lock note it should set the lock status it should reload and

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it should show with a lock.

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Boom lock status set table view reloaded and now it has a lock status.

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It's now locked which is very cool.

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In the next video.

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Get excited guys we're going to set up touch I.D. We're going to write a function that's going to enable

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us to present our touch I.D. or face I.D. pop up.

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We're going to be able to authenticate and then based on whether it's successful or not we can do a

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bunch of different things.

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We will handle some of the errors will present some alerts to show those errors.

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It's going to be awesome guys.

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Let's head over to the next video and let's do that now.