CODEWITHSUNDEEP
swiftswift-playgroundcombine
Artem Novichkov
Artem Novichkov

Reputation: 2341

Combine in Playgrounds

I'm inspecting Combine, a new framework by Apple. I created a playground, ran it in macOS Mojave 10.14.5 and Xcode 11.0 beta (11M336w).

Here is my code: 

import Combine

struct Article: Identifiable {

    var id: Int
    var title: String
}

final class Data: BindableObject {

    let didChange = PassthroughSubject<Data, Never>()

    var showFavouriteOnly = false {
        didSet {
            didChange.send(self)
        }
    }
    var articles: [Article] = [.init(id: 1, title: "WWDC 2018"),
                               .init(id: 2, title: "WWDC 2019")] {
        didSet {
            didChange.send(self)
        }
    }
}

But it fails with log:

error: Couldn't lookup symbols: Combine.PassthroughSubject.send(A) -> ()

What am I doing wrong?

Upvotes: 7

Views: 2417

Answers (2)

L N
L N

Reputation: 2968

The first version of Xcode 11 beta does not have Combine working, it has been stated in the release note.

You should download the second Xcode 11 beta (11M337n)

Upvotes: 1

rob mayoff
rob mayoff

Reputation: 385600

If you created an iOS playground, then Combine should work even if you’re running Xcode 11 or later on macOS 10.14. If you created a macOS playground, Combine will only work if you are running Xcode 11 or later on macOS 10.15 (Catalina) or later.

If you created an iOS playground, then it’s entirely possible that you have found a bug in Combine (or in the Swift compiler). You can report it at Apple’s feedback site if you like.

Upvotes: 2

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