Turn transferUserInfo into sendMessage - ios

Question

I've currently got my data being passed from the iPhone to the Watch using transferUserInfo.
I would like to add an additional function to ask the iPhone for the same data (immediately since it could be the first time the Watch is opened) from the Watch.
So I would needsendMessage:replyHandler:errorHandler:, but I can't figure out how to use it.
(What I have with transferUserInfo:)
iPhone TableViewController.swift:
let applicationDict = ["TC" : newP.tC, "Mat" : newP.mat]
let transfer = WCSession.defaultSession().transferUserInfo(applicationDict)
Watch InterfaceController.swift:
func session(session: WCSession, didReceiveUserInfo userInfo: [String : AnyObject]) {
if let tC = userInfo["TC"] as? String, let mat = userInfo["Mat"] as? String {
receivedData.append(["TC" : tC , "Mat" : mat])
ExtensionDelegate.evnts.append(Evnt(dataDictionary: ["TC" : tC , "Mat" : mat]))
doTable()
} else {
print("tC and mat are not same as dictionary value")
}
}
(What I have tried adding with sendMessage:)
iPhone TableViewController.swift:
let msg = WCSession.defaultSession().sendMessage(applicationDict, replyHandler: nil, errorHandler: nil)
Watch InterfaceController.swift:
func session(session: WCSession, didReceiveMessage message: [String : AnyObject], replyHandler: ([String : AnyObject]) -> Void) {
//handle received message
let value1 = message["TC"] as? String
let value2 = message["Mat"] as? String
//use this to present immediately on the screen
dispatch_async(dispatch_get_main_queue()) {
//self.messageLabel.setText(value)
print("ValWatch1: \(value1)")
print("ValWatch2: \(value2)")
}
//send a reply
replyHandler(["TC":"Yes"])
}
I can't tell what all I have messed up.

Answer 1

The code you are trying to send a message to the watch is correct
let msg = WCSession.defaultSession().sendMessage(applicationDict, replyHandler: nil, errorHandler: nil)
But are you sure the watch is paired? you may need to add this check first before sending the message
if (WCSession.defaultSession().reachable) {
// send message
}
Also make sure your watch app is running while you are trying to send the message from your parent app. If your watch app is not in the foreground, then it wouldn't receive the message sent from your iphone app.