what steps to use to migrate app to swift 6

Generated on 8/12/2024

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To migrate your app to Swift 6, you can follow these steps as outlined in the session "Migrate your app to Swift 6" from WWDC 2024:

  1. Enable Complete Concurrency Checking: Start by enabling complete concurrency checking for each module. This setting allows your project to remain in Swift 5 mode while generating warnings for code that would fail under Swift 6's enforced data isolation.

  2. Resolve Warnings: Go through the warnings generated by the concurrency checking and resolve them. This step ensures that your code is ready for the stricter data isolation rules in Swift 6.

  3. Enable Swift 6 Mode: Once all warnings for a target are resolved, enable Swift 6 mode. This locks in your changes and prevents future regressions to unsafe states.

  4. Repeat for Each Target: Move on to the next target in your project and repeat the process.

  5. Whole App Refactoring: After migrating all targets, consider doing a whole app refactoring to optimize and ensure safety across your entire codebase.

  6. Adopt Concurrency Features: Optionally, adopt new concurrency features to improve responsiveness and performance, ensuring that these changes do not introduce new data races.

For more detailed guidance, you can refer to the session Migrate your app to Swift 6 (07:26) which covers the strategy for migration.

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