What’s New in Swift
This article is just a short overview of this WWDC session. Here are the few things that were discussed as part of the session: 1.) Private variables are now accessible to all the extensions of the class in the same file. 2.) Composing a class with any number of protocols. Example : protocol Shakeable { func shake() } extension UIButton : Shakeable {} extension UISlider : Shakeable {} func shakeControls(controls: [ UIControl & Shakeable ] ) { for control in controls where control.state.isEnabled { control.shake() } } 3.) Swift Versions: Swift 4 is source-compatible with Swift3. Swift3.2 introduced that contains most of the Swift4 syntax changes. So, there will be 2 Swift versions in Xcode9: Swift3.2 & Swift4. The end result is: If you open a Swift 3 project in Xcode9 and build the project with Swift3.2, it should work as it is, i.e., without any code changes. This is mainl