C syntax - Wikipedia
UIViewController + NSNotification extension protocol based @objc issue - Stack Overflow
Working with Objects
Technical Q&A QA1490: Building Objective-C static libraries with categories
Calling Hidden/Private API from Swift in Style | The Startup
FrameworkName' is not a member type of 'FrameworkName' errors inside swiftinterface - Using Swift - Swift Forums
Instantiating Classes by Name in Swift | iJoshSmith
Swift 3 protocol extension using selector error - Stack Overflow
Moving Projects from Obj-C to Swift
Chapter 4. Objective-C Classes
objc' can only be applied to an extension of a class , calling extension method from swift to objective c - Stack Overflow
Defining Classes
Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium
iOS Handbook | Miscellaneous / Swift-Objective C interoperability and best practices
clang: clang::ObjCInterfaceDecl Class Reference
How can I use Objective-C extension functions in Swift with XCode 12.2? - Stack Overflow
Add '@objcMembers' attribute to all class declarations – Swiftify
Pros and Cons of Swift Programming Language | AltexSoft
Pros and Cons of Swift Programming Language | AltexSoft
iOS Tests working with Objective-C and Swift class together | by MonGuNare | If let swift = Programming! | Medium
clang: clang::ObjCInterfaceDecl Class Reference
How can I import Swift code to Objective-C? - Stack Overflow
