Is it true that only pure Objective-C cocoapods can be included in a KMM project? I found this <Star...

# multiplatform

[Azur Haljeta]

Is it true that only pure Objective-C cocoapods can be included in a KMM project? I found this Starscream library for WebSockets, it seems very popular among iOS developers but it's written in Swift.

[Azur Haljeta]

I have Android covered with OkHttp websockets and also want this for iOS done while keeping the same experience by using IntelliJ and Kotlin

[mbonnin]

I know that doesn't really answer your question but you can also do WebSockets with NSURLSessionWebSocketTask on iOS 13+

[mbonnin]

(which removes the Starscream dependency)

[Azur Haljeta]

@mbonnin I'm already using it, it's available right out of the box... but, I didn't manage to get a callback or notified in any other way when the connection drops or when I turn off Wi-Fi. That's a deal breaker and that's why I need another solution

[mbonnin]

Ouch, yea, that hurts

[Sam]

If the Swift pod exposes an interface for objC, it can be used from Kotlin. You also could write a wrapper in Swift that provides an ObjC interface.

[Kris Wong]

the API that kotlin uses to bridge must be objective-C

[Kris Wong]

or C

[zsperske]

does the documentation cover an example of bridging? or does someone have an article example?

[Kris Wong]

the libcurl sample in the K/N samples repo

[Antoine Lamy]

Starscream use URLSessionWebSocketTask under the hood anyway, you can take a look at how they use it internally.

[mbonnin]

@Antoine Lamy

Starscream works with iOS 8/10.10

How can it use URLSessionWebSocketTask that's only available with iOS 13+ ?

[louiscad]

It probably uses multiple APIs

[mbonnin]

Then I'm wondering what you get by using the URLSessionWebSocketTask "backend", I guess smaller binary size

[Antoine Lamy]

On iOS 12+ they use NWConnection and bellow that they use Foundation CFReadStream

[Antoine Lamy]

Implementation details:
• https://github.com/daltoniam/Starscream/blob/07bccd9c16328611c3a4f3b5843ac9264b1b4641/Sources/Transport/TCPTransport.swift
• https://github.com/daltoniam/Starscream/blob/5fbeab4c123753eb5207d11631e1fc8930927b4b/Sources/Transport/FoundationTransport.swift