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I need to open my watch extension from my parent iOS app. I have seen a similar feature implemented in Nike+ Run Club app. ie, When the User taps on Start button in Parent app will open the watch kit extension instantly.

samad5353
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    this is done via startWatchApp(with:completion:) method of HKHealthStore. iOS app configures workout, sends it to watch and watch can start it or not, but that can be done only while iOS app is foreground. https://developer.apple.com/reference/healthkit/hkhealthstore/1648358-startwatchapp – abjurato Mar 27 '17 at 14:42

1 Answers1

12

As @abjurato said, you can only launch it in a "workout mode" 

import HealthKit
import WatchConnectivity
let healthStore = HKHealthStore()

func startWatchApp() {
    print("method called to open app ")

    getActiveWCSession { (wcSession) in
        print(wcSession.isComplicationEnabled, wcSession.isPaired)
        if wcSession.activationState == .activated && wcSession.isWatchAppInstalled {
            print("starting watch app")

            self.healthStore.startWatchApp(with: self.configuration, completion: { (success, error) in
                // Handle errors
            })
        }

        else{
            print("watch not active or not installed")
        }
    }

}

 func getActiveWCSession(completion: @escaping (WCSession)->Void) {
    guard WCSession.isSupported() else { return }

    let wcSession = WCSession.default()
    wcSession.delegate = self

    if wcSession.activationState == .activated {
        completion(wcSession)
    } else {
        wcSession.activate()
        wcSessionActivationCompletion = completion
    }
}
pawisoon
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    Unfortunately this will not wake the watch. Once the watch wakes up the watch app is immediately bought to the foreground, the documentation is very misleading in this sense. – Joe Maher Apr 23 '18 at 01:02