xcode swift对应版本

https://swift.org/download/#releases

Swift 3.0.2 Xcode 8.2

Swift 3.0.1 Xcode 8.1

Swift 3.0 macOS 10.11.5 (El Capitan) Xcode 8.0 beta or later

Swift 2.2.1 macOS 10.11 (El Capitan) Xcode 7.3.1

Swift 2.2 macOS 10.11 (El Capitan) Xcode 7.3