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We learned about Visual Studio for Mac
earlier, so your Mac should be all setup.

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We also should have our Mac Agent setup
for when we worked on the IOS storyboard.

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With the Mac Agent connected,

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we can test it out by showing the
simulator from the Tools menu under iOS.

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You'll see the default
simulator pop up on your Mac.

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While we're here, we'll look at
some of the other tools for iOS.

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The other tools for
iOS are the Device Log, can display

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all activity on a physical device,
even if you're not debugging the app.

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The Mac Agent Console allows for more
complex interactions with the Mac Agent.

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We won't be using it in this course.

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Now, we can launch our app
in iOS using the simulator.

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The first step is to set the startup
project to the iOS PizzaCalculator.

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You can do it by right-clicking and
setting as StartUp Project.

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Or you can choose the startup
project from the toolbar.

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Just like with Android,
the Debug Run button has a drop down to

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select the device you
want to run your app on.

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Doesn't matter which on you choose,

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although I use a phone to
save screen real estate.

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Click the Debug button and
our app should launch.

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So our app launched, but

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we get a error message saying that the
PizzaCalculator.iOS needs to be updated.

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Let's go take a look at how to fix it.

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We'll stop our debug session.

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In the properties for the IOS project,
the current template uses i386,

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but Apple has changed the requirements
to only allow 64-bit instructions.

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Select the supported architecture,

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x86_64, and rebuild the project.

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If you are using a device and
selected the iPhone platform,

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the supported architecture
is ARM 7 plus ARM 64,

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which is correct so
you don't need to change it.

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Now click the Debug button and
switch to the emulator and watch our app.

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Let's enter a value,
calculate, and we get 11.

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You may have discovered another
thing that can be troublesome.

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Once you enter the people count and
tap the calculate button,

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the keyboard does not go away.

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The reason is that the text
entry still has the focus, or

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in Apple terms, first responder.

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So, once you tap the button, we need the
PeopleEntry to not be the first responder.

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If we go back to the view controller
we can add a line to the delegate, so

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the PeopleEntry will
resign first responder.

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We'll stop our app,
go to the view controller,

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When we calculate, we want to resign
first responder from the PeopleEntry.

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Now when we run our app,
The keyboard goes away.

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Now let's stop debugging, And take a quick
look at the configuration options.

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Since we opened the preferences to
set the supported architecture,

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you can see that it's much more
complicated than Android preferences.

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I'll do a brief overview of
the important preferences.

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The iOS Build section, the SDK Version
should be set to default, but

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if you have an older or
beta version selected here,

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Linker Behavior is slightly
different than Android.

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Set Linker Behavior to Don't Link,
will not link any libraries.

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And Link Framework SDKs Only
will link basic class libraries,

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but no user assemblies.

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Supported Architecture must be
set to 64-bit for all new apps.

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The iOS Debug and iOS On-Demand Resource
sections are not important at this point.

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The iOS Bundle section is important for
publishing to stores, but

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the automatic settings usually work for
development.

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None of the other sections
are important at this time.

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The Build, Build Events,
and References Paths, and

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Security are just like any other MS Build
project and don't need to be changed.