WWDC 2017 Platforms State of the Union - Quick Recap

Xcode 9

• (Major) Source Editor - Re-written in Swift from Scratch
• In-built markdown editor
• 3x faster, 60FPS scrolling, 50x faster line jump
• Tokenize editing
• Brand new refactoring system 
• Open Source Refactoring Engine

Swift 4

• String - Now range replaceable, character collection and bi-directional
• Codable - Now easily convert swift types to JSON, Plist. 

Core Technologies

• Indexer rearchitected
• New build system
• Source Control - Github Integration, New navigator option and new clone window in github
• Main Thread API Checker

Testing and CI

• Xcode server built-in
• First match API
• xcodebuild now test multiple destination in-parallel

Wireless development

Drag & Drop

• Large navigation title and new search field
• Easy to enable using prefersLargeTitle = true
• TableView - Now enable self sizing cells