tvOS apps: Apple TV running tvOS 13 or later.macOS apps: Mac running macOS 12 or later.App Clips require iOS 14 or iPadOS 14, or later. iOS or iPadOS apps: iPhone, iPad, or iPod touch running iOS 13 or iPadOS 13 or later.If you’re a member of the developer’s team, the developer can give you access to all builds or certain builds. You’ll be able to access the builds that the developer makes available to you. if let bestPlayer = players.To test beta versions of apps and App Clips using TestFlight, you’ll need to accept an email or public link invitation from the developer and have a device that you can use to test. Use optionals when you might have an instance to return from a function, or you might not. You can even write concurrent code with simple, built-in keywords that define asynchronous behavior, making your code more readable and less error prone. Memory is managed automatically using tight, deterministic reference counting, keeping memory usage to a minimum without the overhead of garbage collection. To best support international languages and emoji, strings are Unicode-correct and use a UTF-8-based encoding to optimize performance for a wide variety of use cases. Inferred types make code cleaner and less prone to mistakes, while modules eliminate headers and provide namespaces. Even better, you don’t even need to type semi-colons. Named parameters are expressed in a clean syntax that makes APIs in Swift even easier to read and maintain.

Swift is the result of the latest research on programming languages, combined with decades of experience building Apple platforms.

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