Swift Libraries

The Swift bindings expose Media over QUIC to iOS, iPadOS, macOS, and the iOS Simulator. Built on the same Rust core (moq-ffi) as the Python and Kotlin packages, wrapped with an idiomatic async/await API.

Packages

Moq

A single Swift Package Manager target that wraps the UniFFI bindings with AsyncSequence adapters, structured-concurrency-friendly cancellation, and a session helper.

Features:

• iOS 15+, iPadOS 15+, macOS 12+
• Universal binary for Apple Silicon and Intel Macs
• iOS device + iOS Simulator slices (arm64 and x86_64)
• Cancellation through Swift Task propagates to native consumers

Learn more

Installation

The package lives in moq-dev/moq-swift, a mirror repo that SPM resolves with bare-semver tags. Add it to your Package.swift:

dependencies: [
    .package(url: "https://github.com/moq-dev/moq-swift", from: "0.2.0"),
],
targets: [
    .target(
        name: "MyApp",
        dependencies: [
            .product(name: "Moq", package: "moq-swift"),
        ],
    ),
]

Or in Xcode: File → Add Package Dependencies → enter the URL.

The package depends on a prebuilt MoqFFI.xcframework attached to the matching moq-ffi-v* release on the source repo. SPM downloads it transparently; no manual asset handling required.

Quickstart

import Moq

// Wire an origin as both publish source and consume sink. Set just one
// side for a subscribe-only or publish-only client.
let origin = MoqOriginProducer()
let client = MoqClient()
client.setPublish(origin: origin)
client.setConsume(origin: origin)

let session = try await client.connect(url: "https://relay.example.com")

let consumer = origin.consume()
let announced = try consumer.announced(prefix: "demos/")
for try await announcement in announced.announcements {
    print("got broadcast \(announcement.path())")

    let catalog = try announcement.broadcast().subscribeCatalog()
    for try await update in catalog.updates {
        print("catalog: \(update)")
    }
}

session.shutdown()

Cancelling the surrounding Swift Task propagates through to the underlying cancel() calls on each consumer.

Source and issues

• Source: swift/ (in the monorepo)
• Mirror (what SPM resolves): moq-dev/moq-swift
• README: swift/README.md