How can I make a weak protocol reference in ‘pure’ Swift (without @objc)

by

You need to declare the type of the protocol as AnyObject.

protocol ProtocolNameDelegate: AnyObject {
    // Protocol stuff goes here
}

class SomeClass {
    weak var delegate: ProtocolNameDelegate?
}

Using AnyObject you say that only classes can conform to this protocol, whereas structs or enums can’t.

More Related Contents:

  1. Protocol doesn’t conform to itself?
  2. Protocol func returning Self
  3. Why can’t a get-only property requirement in a protocol be satisfied by a property which conforms?
  4. Examples of Delegates in Swift [closed]
  5. Swift protocol with “where Self” clause
  6. What does “Protocol … can only be used as a generic constraint because it has Self or associated type requirements” mean?
  7. What is the in-practice difference between generic and protocol-typed function parameters?
  8. Non-‘@objc’ method does not satisfy optional requirement of ‘@objc’ protocol
  9. Why do Self and self sometimes refer to different types in static functions?
  10. A Swift protocol requirement that can only be satisfied by using a final class
  11. Swift – class method which must be overridden by subclass
  12. Swift delegation – when to use weak pointer on delegate
  13. Swift Protocol inheritance and protocol conformance issue
  14. Wait until swift for loop with asynchronous network requests finishes executing
  15. What is ARAnchor exactly?
  16. CFRunLoop in Swift Command Line Program
  17. What is the “some” keyword in Swift(UI)?
  18. How to generate a random number in a range (10…20) using Swift [duplicate]
  19. ARKit – What do the different columns in Transform Matrix represent?
  20. Sort Dictionary by Key Value
  21. Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]
  22. Calling a Swift class factory method with leading dot notation?
  23. Can Swift return value from an async Void-returning block?
  24. Why do I need underscores in swift?
  25. Check empty string in Swift?
  26. Array element cannot be bridged to Objective-C
  27. Use Cocoapods with an App Extension
  28. Increase the size of the indicator in UIPageViewController’s UIPageControl
  29. How do I programmatically move an ARAnchor?
  30. Whats the Swift animate WithDuration syntax?

Leave a Comment