what new on xcode 16

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

1. Code Completion:

   • Xcode 16 features a new code completion engine powered by a specialized coding model trained specifically for Swift and Apple SDKs. This engine uses surrounding code context, such as function names and comments, to provide more accurate suggestions. This is made possible by Apple silicon and runs locally on your Mac, ensuring privacy and fast results. (What’s new in Xcode 16)

2. Swift 6:

   • Swift 6 introduces a new language mode that provides concurrency safety guarantees, turning data races into compile-time issues. This helps improve the correctness and safety of your code. (What’s new in Xcode 16)

3. Previews:

   • Xcode Previews now use a new dynamic linking architecture that avoids rebuilding your project when switching between previews and builds, making the workflow smoother and more productive. Additionally, a new previewable macro allows the use of dynamic properties like state directly in previews. (What’s new in Xcode 16)

4. Builds:

   • Xcode 16 introduces explicit modules, which provide improved parallelism, better diagnostics, and faster debugging without changing any code. For C and Objective-C, explicit modules are enabled by default, while for Swift, you need to opt-in. (What’s new in Xcode 16)

5. Swiftassist:

   • Swiftassist is a new feature that acts as a companion for coding tasks, leveraging a larger and more powerful model that runs in the cloud. It can answer coding questions and provide assistance, enhancing productivity. (Platforms State of the Union)

6. Instruments and Flame Graphs:

   • Xcode 16 includes enhancements to Instruments, such as a single view of backtraces and a flame graph for profiling data, providing deeper insights into app performance. (What’s new in Xcode 16)

7. Localization:

   • Enhancements to localization catalogs make it easier to bring your app to more people around the world. (Platforms State of the Union)

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