Apple Watch and iPhone app (Parent App) communication sample application
AppDelegate.swift - Parent AppDelegate class WatchKit Listner
func application(application: UIApplication, handleWatchKitExtensionRequest userInfo: [NSObject : AnyObject]?, reply: (([NSObject : AnyObject]!) -> Void)!){
//handle watchkit communication
}
In WatckKit Extension, Communicate to parent app using the below api
WKInterfaceController.openParentApplication(userInfo, reply: { (response : [NSObject : AnyObject]!, error:NSError!) -> Void in
//respons from parent app
})