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Hey everybody this is Caleb with slopes and in this video it's going to be a shorter one we're going

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to basically enable our camera to utilize the flash.

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We can set it to be automatic but I think it's cool to give the user the ability to control whether

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or not their flash is on or off.

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So we're going to do that.

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It's very easy.

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Let's go ahead and pull open that X code project and let's make it happen right now.

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So to begin we actually need to think about the flash option.

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We either can have the flash on or off.

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And to control that we're going to use an enum to just kind of control the state of the flash the flash

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light.

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So an ENM can be used for this.

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We can go ahead and type Inam flash state and we can give it to cases either off or on can we can use

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this ENM to basically save the state of the honor off light and then later we can tell the camera that

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we want it to be off or on based on what the user sets with the buttons.

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OK very cool.

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And actually before we even go further than this we're going to need to create a default state.

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So when the app opens we're going to set it to be off by default because I think most people would probably

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want it to be off unless they want it to be on for the most part.

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So to do that go ahead and type var flash control state.

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That's of course going to be of type flash state and we're going to actually just do this.

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We're going to set it to be off by default.

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Now when this variable is utilized when we actually instantiated it's going to get set to be off just

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from the get go.

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OK that's very cool.

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Very easy way to do it.

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And you know while I'm here I'm going to get rid of that comment.

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Don't need it.

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And now what we're going to do is we're going to utilize that ENM to go ahead and set up our settings

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for the flash and the way we do that is where we capture our photo.

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It did tap camera view.

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OK.

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So we have capture photo here.

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And the cool thing is one of the settings is the flash mode.

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So we're going to use our our variable up here flash control state which of course is set off at the

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beginning.

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We're going to go ahead and we're going to type if Flash control state is equal to off.

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OK so when we open the app if it's equal to off we're going to call settings flash mode equals off else

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telling you guys this is easy stuff else settings.

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Flash mode equals on.

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And actually you know what you probably noticed there is an auto setting which automatically monitors

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the light around you but the user wants to have control ultimately over the flash mode whether it's

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on or off.

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OK.

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So that's that if it's off the flash mode will be off.

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If it's on the flash motor will be on.

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All right.

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Super easy.

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Now that's how we're going to control it.

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But the thing we need to think about is how will we change the flash control state.

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And we're going to use.

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Let me show you the example here where is it.

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We're going to use the flash button to change the state if.

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If it's off and we tap the button it should change to say on and we should change the flash control

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state to be on as well.

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So to do that we're going to use an IB action as you may have suspected.

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So to do that go ahead and go to main storyboard let it load.

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There we go.

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And go ahead and tap on the little assistant editor and it looks like we're already properly in our

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control or that's great.

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So scroll down to the bottom.

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Iby actions are usually put at the bottom of a code file just by convention and go and right click and

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then drag and we're going to use this to create an IB action.

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So go ahead and type sorry.

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Choose action then type flash button was pressed to basically describe what happens when that IAB action

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is used.

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We're pushing a button to trigger that action.

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Now what we're going to do is we're basically going to use a switch to flip between the two different

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states.

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So go ahead and type switch and we're going to create a switch of flash control state and there are

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two cases of course that we can switch between one is case off and the other one is case on.

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Simple as that.

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Now if the case are sorry if the flash control state is off and we tap the button we should change the

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button title to say on OK if it's off and we tap it it should say on if it's on and we tap it it should

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say off.

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So to do that go ahead and type flash control or flash button I suppose.

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And to change the title you need to do set title.

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Now of course the title string will say whoops we'll say flash on in caps and the UI control state is

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actually just normal.

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That way we can actually set it when we tap the button.

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And after that if if the flash control state is off we tap the button to make it say on.

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We should also change the flash control state to be on because then the flash should be on.

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OK.

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Simple as that.

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And you're probably guessing this already but basically we're going to do the exact opposite of this

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for the other case so I'm actually going to copy and paste it because it's very very very little code.

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I'm going to change the title to say flash off and the control state will also be off.

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Now believe it or not this is all we needed to do to set up our flash.

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But there's one thing that's just been bugging me.

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This green view I want to change it to be white again because it shouldn't be shouldn't be green just

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doesn't look right.

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Keiko hadn't changed that to white and build and run this out.

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Let's go see how we did going to close.

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My assistant editor there.

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It should build and run.

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We should see it.

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And we should be able to turn the flash off.

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OK.

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Let's try to take a picture here.

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OK good.

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In a flash.

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Let's tap the button.

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The label changed and let's see you want to take a picture now.

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Hey there's the flash.

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It works.

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That's so cool.

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So let's try it again.

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Yep we've got a flash.

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Let's turn it off.

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Know flash see that super super cool awesome job guys that's all we needed to do to integrate the flash

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in the next video we're actually going to go ahead and we're going to set up Avies speech synthesizer

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so that we can speak what is happening what are what our phone is seeing right now seeing or remote

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control.

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We're going to set it up so that it says I think this is a remote control and I'm 99 percent sure if

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it's not sure it's going to say this message.

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I'm not sure what this is.

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Please try again.

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Simple as that.

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So we'll see in the next video.

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Amazing work with this one.

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This is Caleb with Dev slopes dot com.