iOS 7 introduced Dynamic Type which allows the user to specify the font size in Settings.  The easiest way to support dynamic type is to use one of Apple’s pre defined Font Text Style’s below.

Swift 3 and Swift 4

UIFontTextStyle.title1
UIFontTextStyle.title2
UIFontTextStyle.title3
UIFontTextStyle.headline
UIFontTextStyle.subheadline
UIFontTextStyle.body
UIFontTextStyle.callout
UIFontTextStyle.footnote
UIFontTextStyle.caption1
UIFontTextStyle.caption2

Swift 2.2

UIFontTextStyleTitle1
UIFontTextStyleTitle2
UIFontTextStyleTitle3
UIFontTextStyleHeadline
UIFontTextStyleSubheadline
UIFontTextStyleBody
UIFontTextStyleCallout
UIFontTextStyleFootnote
UIFontTextStyleCaption1
UIFontTextStyleCaption2

Here is a code example in Swift 3 or Swift 4 of using the Headline font style.

These instructions are for localizing the information contained in the Info.plist.  This includes the app’s name which is displayed on the user’s home screen under your app icon.

1. In Xcode go to File, New, File..
2. Select iOS (or the platform you are working with), Resource, Strings File, Next.
3. Name the file InfoPlist.strings (case sensitive).
4. If you only plan on having one App name for your project then I recommend placing the file in the same directory as your Localizable.strings file.  However, if you have multiple targets and some of them use different app names then you will want to create a separate directory for the InfoPlist.strings file.  You will then need to create a separate InfoPlist.strings file for each app name and associate it with the correct target.
5. Select the newly created InfoPlist.strings file and add the following key, value pairs:

"CFBundleDisplayName" = "Your App Name";    //App name as displayed below app icon
"CFBundleName" = "Your App Name"    //Short app name, should be 16 characters or less

Localization is the translation of the app’s user interface into locale specific languages.  In order to support localization we will use a strings file.

Creating a Localizable.strings file

I like to place the strings file in its own folder called “Resources”.

In Xcode, Select “File”, “New”, “File…”

In the template picker select the “Resource” for the appropriate OS.  Select “Strings File”.

Name the file “Localizable.strings”.  This is the iOS default naming convention, don’t name it something else unless you want to refer to it by name every time you need to reference it.

Promo codes allow you to give away your paid app for free.  They are mainly used for sending your app to journalists or bloggers so that they can review your app at no cost to them.  You can also send them to your friends or reward those who made some contribution to the apps development.  Developers can generate up to 100 promo codes per version.  Each code expires 28 days after generation or when you release a new version of the app, whichever comes first.

How to access the user’s location with CLLocationManager on tvOS.

1. Add the key NSLocationWhenInUseUsageDescription to your Info.plist.  Also add a default value that will be displayed in the prompt to the user.
2. Add the key CFBundleDisplayName to your Info.plist.  Also add a default value that will be displayed as the App name in the home screen and in the prompt.
3. Localize your prompt and display name by adding a InfoPlist.strings file.  This file can be located in the same directory as your Localizable.strings file.
   1. Add NSLocationWhenInUseUsageDescription and CFBundleDisplayName as keys and localize their values.

If you prefer to work with code programmatically instead of via Storyboards then this tutorial will help you start a brand new iOS or tvOS project by removing the default main storyboard.

From Xcode, select File…New…Project.  (iOS/tvOS)…Application…Single View Application…Next.

Give your project a title.  Select the appropriate checkmarks for Core Data and testing.  Press Next.

Delete Main.storyboard and select Move to Trash.

Select the project from the Project Navigator. Select the Target.  Under General…Deployment Info…Main Interface, delete “Main”.

As a software developer or marketer of iOS apps we rely on our tools to help build our products and save us time.  Below are 25 useful tools for building iOS apps.

<td>
  <span><b>Description</b></span>
</td>

<td>
  <span>A tool like grep, optimized for programmers</span>
</td>

<td>
  <span><span>Professional Graphic Design Software for the Mac.<br /> </span></span><span>Affinity Designer is the fastest, smoothest, most precise vector graphic design software available.<br /> </span>
</td>

<td>
  <span>Smart IDE for iOS/OS X development</span>
</td>

<td>
  <span>Sales manager for downloading iTunes connect sales reports, reviews and rankings.</span>
</td>

<td>
  <span>Free, open source, cross-platform software for recording and editing sounds</span>
</td>

<td>
  <span>Mac App for editing Podfiles</span>
</td>

<td>
  <span>Libre FTP, SFTP, WebDAV, S3, Azure & OpenStack Swift browser</span>
</td>

<td>
  <span>Mass delete iOS contacts in Address Book.<span class="Apple-converted-space">&nbsp; </span>Useful when testing apps that use the address book</span>
</td>

<td>
  <span>The Screenshot Shortcut</span>
</td>

<td>
  <span>IDE for Java and more</span>
</td>

<td>
  <span>Build and release automation</span>
</td>

<td>
  <span>Finder for your iOS device</span>
</td>

<td>
  <span>Edit your app previews</span>
</td>

<td>
  <span>Open source, software development platform.<span class="Apple-converted-space">&nbsp; </span>(I like the diffs the best)</span>
</td>

<td>
  <span>API explorer app for Google Chrome</span>
</td>

<td>
  <span>Record your app preview videos</span>
</td>

<td>
  <span>Telestream ScreenFlow is a professional tool to record and edit App Preview videos or marketing videos featuring your app.</span>
</td>

<td>
  <span>Easily open the iOS Simulator directory</span>
</td>

<td>
  <span>Modify the iOS Simulator so that it has a perfect status bar, then run your app and take perfect screenshots every time</span>
</td>

<td>
  <span>Professional digital design for Mac</span>
</td>

<td>
  <span>Git & Mercurial client</span>
</td>

<td>
  <span>Sql and coredata manager/editor.</span>
</td>

<td>
  <span>Text editor</span>
</td>

<td>
  <span>OpenVPN</span>
</td>

<td>
  <span>Accounting and Taxes for indie&#8217;s</span>
</td>

<td>
  <span>Objective-C and Swift IDE</span>
</td>

Is Xcode giving you the error in Localizable.strings “Read failed: The data couldn’t be read because it isn’t in the correct format.” but it isn’t telling you what line the error is on?

Use the command line tool plutil to find that missing semicolon or double quote.

cd to the directory of the offending Localizable.strings file and run

plutil -lint Localizable.strings

It should respond with something like:

CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary on line 86. Parsing will be abandoned. Break on _CFPropertyListMissingSemicolon to debug.

Mastering the tvOS Focus Engine by airbnb

Detecting Gestures and Button Presses by Apple

iOS to tvOS Tips by 3 Sided Cube

In Swift use:

#if os(tvOS)
    //tvOS code here
#elseif os(iOS)
    //iOS code here
#endif

In Objective-C use:

#if TARGET_OS_TV
    //tvOS code here
#else TARGET_OS_IOS
    //iOS code here
#endif

Did you find this post helpful? Support independent development and improve your sleep by downloading White Noise and Deep Sleep Sounds free from the App Store.

In Apple’s new tvOS, data saved in core data is not persisted but is only cached.  The tvOS may delete the data stored in core data when space is low.

From https://developer.apple.com/library/tvos/documentation/General/Conceptual/AppleTV_PG/

Local Storage for Your App Is Limited

The maximum size of an Apple TV app is limited to 200 MB. Moreover, your app can only access 500 KB of persistent storage that is local to the device (using the NSUserDefaults class). Outside of this limited local storage, all other data must be purgeable by the operating system when space is low. You have a few options for managing these resources: