Meet Watch Face Sharing

7:20 - Detect Paired Watch

var isPaired: Bool {
    if (WCSession.isSupported()) {
        let session = WCSession.default
        session.delegate = self
        session.activate()
        return session.isPaired
    } else {
        return false
    }
}

9:01 - Add Face Wrapper

private func addFaceWrapper(withName: String) {
    if let watchfaceURL = Bundle.main.url(forResource: withName, withExtension: "watchface") {
        CLKWatchFaceLibrary().addWatchFace(at: watchfaceURL, completionHandler: {
            (error: Error?) in
            if let nsError = error as NSError?, nsError.code == CLKWatchFaceLibrary.ErrorCode.faceNotAvailable.rawValue {
                print(nsError)
            }
            isLoading = false
        })
    }
}

11:04 - Add Face Wrapper with Fallback Face

private func addFaceWrapper(withName: String, fallbackName: String?) {
    if let watchfaceURL = Bundle.main.url(forResource: withName, withExtension: "watchface") {
        CLKWatchFaceLibrary().addWatchFace(at: watchfaceURL, completionHandler: {
            (error: Error?) in
            if let nsError = error as NSError?, nsError.code == CLKWatchFaceLibrary.ErrorCode.faceNotAvailable.rawValue {
                if let name = fallbackName {
                    // We failed, trying with fallbackName.
                    addFaceWrapper(withName: name, fallbackName: nil)
                }
            }
            isLoading = false
        })
    }
}