what's new in xocde

Generated on 8/2/2024

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What's New in Xcode 16

Xcode 16 introduces several new features and improvements to enhance the development experience across various stages of app development. Here are some of the key updates:

  1. Code Completion:

    • Xcode 16 features a new code completion engine powered by an on-device coding model specifically trained for Swift and Apple SDKs. This engine uses surrounding code context, such as function names and comments, to provide more thorough code suggestions. This feature is available when running Xcode 16 on macOS Sequoia.
    • The new engine can predict the code you need, using your project symbols to customize suggestions. It runs locally on your Mac, ensuring your code remains private and providing super-fast results, even when offline.

  2. Swift 6 Integration:

    • Swift 6 introduces a new language mode that provides concurrency safety guarantees, turning data races into compile-time issues, thereby improving the correctness and safety of your code.

  3. Previews:

    • Xcode Previews now use a new dynamic linking architecture that employs the same build artifacts for previews and when you build and run. This avoids the need to rebuild your project when switching between the two, resulting in a smoother and more productive workflow.
    • A new previewable macro allows the use of dynamic properties like state directly in an Xcode preview, reducing the amount of code you need to write.

  4. Build Improvements:

    • Xcode 16 introduces explicit modules, which provide improved parallelism, better diagnostics, and faster debugging without changing a single line of code. For C and Objective-C, explicit modules are on by default, while for Swift, you need to opt-in.

  5. Swiftassist:

    • Swiftassist is a new companion for all your coding tasks, capable of answering coding questions and helping with tasks like experimenting with new APIs. It leverages a larger and more powerful model that runs in the cloud.

  6. Debugging and Testing:

    • Enhancements include a single view of your backtraces showing relevant code from all stack frames together, a flame graph of your profiling data in Instruments, and improvements to localization catalogs.

For a detailed overview, you can watch the session What’s new in Xcode 16.

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