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The SRTC Swift SDK is a native audio and video SDK distributed as a Swift Package, with the public module name SRTC. It currently supports:
  • iOS 16.0 and later
  • macOS 14.0 and later
  • Xcode 15 and later
  • Swift 5.9 and later
Starting with 1.4.0, the minimum system versions were raised from iOS 13 / macOS 10.15 to iOS 16 / macOS 14. Projects below these minimums can’t resolve version 1.4.0 or later (you get a dependency resolution failure, not a compile error); projects that still need to support older systems should stay on 1.3.3.The minimums are dictated by the inference runtime used for virtual background. SwiftPM’s platforms: applies to the whole package and has no per-target minimum, so there’s no way to apply this requirement to virtual background alone.
There are two SRTC SDKs for Apple platforms—confirm which one you need first. This section covers the native Swift SDK (import SRTC, distributed as a Swift Package, supporting both iOS and macOS); there is also an Objective-C RTCEngineKit (distributed via CocoaPods, iOS only)—see iOS SDK (Chinese).For new projects, we recommend the Swift SDK described here. The two APIs can’t be mixed, and don’t include both in the same project.

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Integrate with Swift Package Manager

The SDK is distributed as a prebuilt XCFramework containing slices for three platforms: iOS devices, the iOS Simulator, and macOS.

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Declare it in Package.swift

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Add it in Xcode

If you use an Xcode project instead of a pure SPM project:
  • Open File > Add Package Dependencies...
  • Enter https://github.com/seastart/srtc-swift-sdk.git
  • Select SRTC for your target

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SRTCBroadcastKit (only for full-screen screen sharing on iOS)

The same package also contains an SRTCBroadcastKit product. It is used only by the Broadcast Upload Extension for iOS screen sharing; regular integrations don’t need it. For integration steps, see Screen sharing (Chinese).
Add SRTCBroadcastKit only to the extension target—don’t add it to the app target; the extension target also must not depend on SRTC. The extension process has a 50 MB memory limit, and linking WebRTC gets it killed by the system; meanwhile, SRTC on the app side already contains the same code, and linking it twice puts two copies of the same types in one process.

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Import the SDK

The underlying WebRTC and signaling components are resolved automatically by Swift Package Manager; you don’t need to add another layer manually.

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Configure permissions

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iOS

Add the following to Info.plist:

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macOS

The app’s Info.plist also needs:
If you use screen sharing, also note:
  • macOS screen sharing is based on ScreenCaptureKit
  • Sharing a window or display requires the user to grant permission in a system prompt
  • Capturing system audio requires newer system capabilities—see Screen sharing (Chinese)

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Minimal integration checklist

  • SRTC has been added to your target’s dependencies
  • Camera / microphone permission strings are configured
  • Your backend can already issue the token needed to join a channel
  • Your UI has a local preview area and a remote video area ready
After completing the steps above, continue with Quickstart.