What new in Xcode

What's New in Xcode 16

Xcode 16 introduces several new features and improvements across various aspects of app development. 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 to provide more accurate suggestions and runs locally on your Mac, ensuring privacy and fast results. Platforms State of the Union

2. Swift 6:

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

3. Xcode Previews:

   • Xcode Previews now use a dynamic linking architecture that avoids rebuilding your project when switching between previews and builds, resulting in a smoother workflow. Additionally, a new previewable macro allows the use of dynamic properties like state directly in previews. Platforms State of the Union

4. Build Improvements:

   • Explicit modules are introduced, providing improved parallelism, better diagnostics, and faster debugging. For C and Objective-C, explicit modules are on by default, while for Swift, they need to be enabled in build settings. What’s new in Xcode 16

5. Debugging Enhancements:

   • The thread performance checker now surfaces issues like main thread hangs, priority inversions, excessive disk writes, and slow app launches, helping you improve your app's performance. What’s new in Xcode 16

6. Instruments and Flame Graphs:

   • Instruments now include a flame graph feature that provides a visual way of seeing call stacks, helping you identify performance issues more effectively. What’s new in Xcode 16

7. SwiftAssist:

   • SwiftAssist is a new tool that leverages a larger and more powerful model running in the cloud to assist with coding tasks, providing answers and suggestions to help you code more efficiently. Platforms State of the Union

Relevant Sessions

• What’s new in Xcode 16
• Platforms State of the Union
• Xcode essentials

These sessions provide a comprehensive overview of the new features and improvements in Xcode 16, making it easier and more efficient to develop apps for Apple platforms.