即使使用AppGroup，我的Iwatch也无法从ios App中保存数据

Question

I have read and followed several instructions and videos in attempt to get my iphone and iwatch app use the same Userdefaults storage. I have created an appgroup and used the appgroup name like this

preferences = UserDefaults(suiteName: "group.com.xxxx.appname")!

but it still does not work as expected

I have read through almost all(if not all) questions related to this on stackoverflow, but I am still not getting expected result.

The last post I read suggested using WCSession, so I followed this url http://www.codingexplorer.com/watch-connectivity-swift-application-context/

After all these attempts, my Iwatch is still unable to use the preferences/data I am setting on my ios app.

Any response would be appreciated towards fixing this.

Answer 1

App Groups are no longer an option when attempting to access data on both of the devices.

You now need to use the WatchConnectivity Framework.

Here's an example on how to use this:

IOS

import WatchConnectivity

class ViewController: UIViewController, WCSessionDelegate{

   override func awake(withContext context: Any?) {
        super.viewDidLoad()
        if WCSession.isSupported(){
            WCSession.default.activate()
            WCSession.default.delegate = self
        }
    }

}

watchOS

import WatchConnectivity

class InterfaceController: WKInterfaceController, WCSessionDelegate{

    override viewDidLoad(){
        super.viewDidLoad()
        if WCSession.isSupported(){
            WCSession.default.activate()
            WCSession.default.delegate = self
            let data = ["data1": 1, "data2": 2]
            WCSession.default.sendMessage(data, replyHandler: {reply in 
                print("Got reply \(reply)")
            }, errorHandler: {error in 
                print("Got error \(error)")
            })  
        }
    }
    func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Void) {    
        print("Received \(message)") // ["data1": 1, "data2": 2]
        replyHandler(["messagedReceived": true])
    }
}

The above code isn't tested, but should be more than enough to get you started.