swift-concurrency-6-2

Swift 6.2 concurrency prevents data races by enforcing single-threaded execution by default, requiring explicit background offloading using @concurrent to isolate state and manage threads safely.

Migrate an iOS app to Swift 6.2 concurrency by enabling Approachable Concurrency build settings in Xcode, isolating UI code on MainActor, and offloading heavy tasks like image processing using @concurrent.

Use @concurrent in Swift 6.2 when offloading heavy background tasks, such as image processing, from the main thread to ensure safe concurrent execution without introducing data races.

Yes, Swift 6.2 requires MainActor isolation for UI-related code to ensure it executes on the main thread by default, utilizing safe protocol conformances to protect global state during migration.

The best way to offload heavy tasks without data races is using Swift 6.2's explicit @concurrent attribute to move processing to background threads while maintaining default single-threaded isolation.