Dealing With Objective-C Protocol Types in Swift
There are two ways to refer to this protocol in Swift: using a native Swift type, or using an Objective-C
Protocolobject reference.let fungibleSwiftProtocol = Fungible.self let fungibleObjCProtocol = NSProtocolFromString("Fungible")!These two types should be the same—after all, they refer to the same protocol—but they are not, as shown when we print out their descriptions and
ObjectIdentifiers[…][…]
The answer is yes: there is a way to convert a Swift type that refers to an Objective-C protocol into an Objective-C
Protocolreference.[…]
fungibleSwiftProtocol as AnyObject as? Protocol
There is apparently no way to convert in the other direction.
Previously:
- Swift Concurrency and Objective-C
- Swift Protocol Requirement Quirks
- The Surprising Cost of Checking Protocol Conformances in Swift
- Protocol Composition in Swift and Objective-C
- Swift Protocols
1 Comment RSS · Twitter
October 7, 2024 8:44 PM
If only there was
fungibleSwift as AnyFADGarbage as! ObjC
To help us get rid of this ever-growing nightmare of a language.
