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WWDC20 · 14 min · Safari & Web / SwiftUI & UI Frameworks

Meet Watch Face Sharing

Show off your watchOS app’s complications and create a watch face worth sharing. Learn how to share watch faces inside your watchOS and iOS apps or host them on the web for anyone to find and download. We’ll also explore best practices for using watch face preview images, and show you how to create a smooth installation experience.

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 3 snippets

Detect Paired Watch swift · at 7:20 ↗ 
var isPaired: Bool {
    if (WCSession.isSupported()) {
        let session = WCSession.default
        session.delegate = self
        session.activate()
        return session.isPaired
    } else {
        return false
    }
}
Add Face Wrapper swift · at 9:01 ↗ 
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
        })
    }
}
Add Face Wrapper with Fallback Face swift · at 11:04 ↗ 
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
        })
    }
}

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