Phone to Watch communication

watchcomm.swift

// Phone
  func application(application: UIApplication, handleWatchKitExtensionRequest userInfo: [NSObject : AnyObject]?, reply: (([NSObject : AnyObject]!) -> Void)!) {
    
    if let request = userInfo!["request"] as? String {
      if request == "refreshData" {
        reply(["fromPhone": NSKeyedArchiver.archivedDataWithRootObject("iPhone data")])
        return
      }
    }
    
    reply([:])
  }

// Watch
  @IBAction func getLocationBtn() {
    
    WKInterfaceController.openParentApplication(["request": "refreshLoc"],
      
      reply: { (replyInfo, error) -> Void in
        
        if let a = replyInfo["locData"] as? NSData,
          b = NSKeyedUnarchiver.unarchiveObjectWithData(a) as? String {
            
            self.locationLbl.setText(b)
        
        }
    })
  }