Migrating to Swift 3

Some tips and tricks to help you migrate your code to Swift 3 almost flawlessly. The key is to follow Swift API Guideline

Presented during MyCocoaheads meetup, September 2016

1. Migrating to Swift 3.0
2. 90 Changes It breaks things * https://swift.org/blog/swift-3-0-released/
3. Preparation
4. • Be strict, try to solve and handle all warnings. • If you haven’t follow Swift API Guideline, do so • Ensure your code, works and compiled successfully on Xcode 7.3.1 • Commit the changes
5. Installation
6. • Move your current Xcode 7 to different folder !! • Install Xcode 8, download from Apple Developer website
7. The tricky part
8. • Open Xcode 8 • Select the correct xcode-build • Open your .xcodeproj and do migration to Swift 3* (do clean and clean build folder first) • Fix the errors and warning (if you’ve been following Swift API Guideline, nothing much needed)
9. • Update your Podfile / Cartfile • pod install / carthage update Cocoapods & Carthage • Build and integrate dependancy manually • carthage update --no-build Alternative ??
10. Moving on
11. • Follow Swift API Guideline • Try not to depend on 3rd Party library so much • Contribute to Swift project
12. • https://swift.org/migration-guide/ • https://swift.org/documentation/api-design- guidelines/ • https://swift.org/blog/swift-3-0-released/ Resources