Nullability and Objective-C - Swift BlogSwift is now open source. For the latest news, visit the Swift open source blog UPDATE: This post was updated to use the new _Nullable syntax in Xcode 7. One of the great things about Swift is that it transparently interoperates with Objective-C code, both existing frameworks written in Objective-C and code in your app. However, in Swift there’s a strong distinction between optional and non-option
