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WatchConnectivity Singleton Demo
//
// WatchSessionManager.swift
// WatchConnectivityDemo
//
// Created by Natasha Murashev on 9/3/15.
// Copyright © 2015 NatashaTheRobot. All rights reserved.
//
import WatchConnectivity
class WatchSessionManager: NSObject, WCSessionDelegate {
static let sharedManager = WatchSessionManager()
private override init() {
super.init()
}
private let session: WCSession? = WCSession.isSupported() ? WCSession.defaultSession() : nil
private var validSession: WCSession? {
// paired - the user has to have their device paired to the watch
// watchAppInstalled - the user must have your watch app installed
// Note: if the device is paired, but your watch app is not installed
// consider prompting the user to install it for a better experience
if let session = session where session.paired && session.watchAppInstalled {
return session
}
return nil
}
func startSession() {
session?.delegate = self
session?.activateSession()
}
}
// MARK: Application Context
// use when your app needs only the latest information
// if the data was not sent, it will be replaced
extension WatchSessionManager {
// Sender
func updateApplicationContext(applicationContext: [String : AnyObject]) throws {
if let session = validSession {
do {
try session.updateApplicationContext(applicationContext)
} catch let error {
throw error
}
}
}
// Receiver
func session(session: WCSession, didReceiveApplicationContext applicationContext: [String : AnyObject]) {
// handle receiving application context
dispatch_async(dispatch_get_main_queue()) {
// make sure to put on the main queue to update UI!
}
}
}
// MARK: User Info
// use when your app needs all the data
// FIFO queue
extension WatchSessionManager {
// Sender
func transferUserInfo(userInfo: [String : AnyObject]) -> WCSessionUserInfoTransfer? {
return validSession?.transferUserInfo(userInfo)
}
func session(session: WCSession, didFinishUserInfoTransfer userInfoTransfer: WCSessionUserInfoTransfer, error: NSError?) {
// implement this on the sender if you need to confirm that
// the user info did in fact transfer
}
// Receiver
func session(session: WCSession, didReceiveUserInfo userInfo: [String : AnyObject]) {
// handle receiving user info
dispatch_async(dispatch_get_main_queue()) {
// make sure to put on the main queue to update UI!
}
}
}
// MARK: Transfer File
extension WatchSessionManager {
// Sender
func transferFile(file: NSURL, metadata: [String : AnyObject]) -> WCSessionFileTransfer? {
return validSession?.transferFile(file, metadata: metadata)
}
func session(session: WCSession, didFinishFileTransfer fileTransfer: WCSessionFileTransfer, error: NSError?) {
// handle filed transfer completion
}
// Receiver
func session(session: WCSession, didReceiveFile file: WCSessionFile) {
// handle receiving file
dispatch_async(dispatch_get_main_queue()) {
// make sure to put on the main queue to update UI!
}
}
}
// MARK: Interactive Messaging
extension WatchSessionManager {
// Live messaging! App has to be reachable
private var validReachableSession: WCSession? {
if let session = validSession where session.reachable {
return session
}
return nil
}
// Sender
func sendMessage(message: [String : AnyObject],
replyHandler: (([String : AnyObject]) -> Void)? = nil,
errorHandler: ((NSError) -> Void)? = nil)
{
validReachableSession?.sendMessage(message, replyHandler: replyHandler, errorHandler: errorHandler)
}
func sendMessageData(data: NSData,
replyHandler: ((NSData) -> Void)? = nil,
errorHandler: ((NSError) -> Void)? = nil)
{
validReachableSession?.sendMessageData(data, replyHandler: replyHandler, errorHandler: errorHandler)
}
// Receiver
func session(session: WCSession, didReceiveMessage message: [String : AnyObject], replyHandler: ([String : AnyObject]) -> Void) {
// handle receiving message
dispatch_async(dispatch_get_main_queue()) {
// make sure to put on the main queue to update UI!
}
}
func session(session: WCSession, didReceiveMessageData messageData: NSData, replyHandler: (NSData) -> Void) {
// handle receiving message data
dispatch_async(dispatch_get_main_queue()) {
// make sure to put on the main queue to update UI!
}
}
}
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