“Today at WWDC, we announced Swift 2.0. This new version has even better performance, a new error handling API, and first-class support for availability checking. And platform APIs feel even more natural in Swift with enhancements to the Apple SDKs.”
A few highlights of Swift 2:
- Error handling model
- Availability blocks
- Protocol extensions
You can read all about Swift 2.0 with this pre-release iBook: The Swift Programming Language (Swift 2 Prerelease).