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