我已经完成了https://www.raywenderlich.com/117329/watchos-2-tutorial-part-4-watch-connectivity的教程，一切正常，但登机牌不会因出于某种原因显示在已登记的航班上。
这是我的AppDelegate：
import UIKit
import WatchConnectivity
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var session: WCSession? {
didSet {
if let session = session {
session.delegate = self
session.activate()
}
}
}
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
if WCSession.isSupported() {
session = WCSession.default()
}
return true
}
}
extension AppDelegate: WCSessionDelegate {
/** Called when all delegate callbacks for the previously selected watch has occurred. The session can be re-activated for the now selected watch using activateSession. */
@available(iOS 9.3, *)
public func sessionDidDeactivate(_ session: WCSession) {
}
/** Called when the session can no longer be used to modify or add any new transfers and, all interactive messages will be cancelled, but delegate callbacks for background transfers can still occur. This will happen when the selected watch is being changed. */
@available(iOS 9.3, *)
public func sessionDidBecomeInactive(_ session: WCSession) {
}
/** Called when the session has completed activation. If session state is WCSessionActivationStateNotActivated there will be an error with more details. */
@available(iOS 9.3, *)
public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
}
func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Void) {
if let reference = message["reference"] as? String, let boardingPass = QRCode(reference) {
replyHandler(["boardingPassData": boardingPass.PNGData as AnyObject])
}
}
}
这是我的BoardingPassController：
import WatchKit
import Foundation
import WatchConnectivity
class BoardingPassInterfaceController: WKInterfaceController {
@IBOutlet var originLabel: WKInterfaceLabel!
@IBOutlet var destinationLabel: WKInterfaceLabel!
@IBOutlet var boardingPassImage: WKInterfaceImage!
var flight: Flight? {
didSet {
if let flight = flight {
originLabel.setText(flight.origin)
destinationLabel.setText(flight.destination)
if let _ = flight.boardingPass {
showBoardingPass()
}
}
}
}
var session: WCSession? {
didSet {
if let session = session {
session.delegate = self
session.activate()
}
}
}
private func showBoardingPass() {
boardingPassImage.stopAnimating()
boardingPassImage.setWidth(120)
boardingPassImage.setHeight(120)
boardingPassImage.setImage(flight?.boardingPass)
}
override func awake(withContext context: Any?) {
super.awake(withContext: context)
if let flight = context as? Flight { self.flight = flight }
}
override func didAppear() {
super.didAppear()
// 1
if let flight = flight, flight.boardingPass == nil && WCSession.isSupported() {
// 2
session = WCSession.default()
// 3
session!.sendMessage(["reference": flight.reference], replyHandler: { (response) -> Void in
// 4
if let boardingPassData = response["boardingPassData"] as? NSData, let boardingPass = UIImage(data: boardingPassData as Data) {
// 5
flight.boardingPass = boardingPass
DispatchQueue.main.async(execute: { () -> Void in
self.showBoardingPass()
})
}
}, errorHandler: { (error) -> Void in
// 6
print(error)
})
}
}
}
extension BoardingPassInterfaceController: WCSessionDelegate {
/** Called when the session has completed activation. If session state is WCSessionActivationStateNotActivated there will be an error with more details. */
@available(watchOS 2.2, *)
public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
}
}
最后，这是Xcode所说的：
2017-04-02 12:44:30.355378 Watch Extension[3124:56068] [WC] WCSession has not been activated
2017-04-02 12:44:30.356432 Watch Extension[3124:56068] [WC] -[WCSession _onqueue_notifyOfMessageError:withErrorHandler:] errorHandler: YES with WCErrorCodeSessionNotActivated
2017-04-02 12:44:30.357903 Watch Extension[3124:56068] [WC] __60-[WCSession _onqueue_notifyOfMessageError:withErrorHandler:]_block_invoke dropping as pairingIDs no longer match. pairingID (null), client pairingID: (null)
Error Domain=WCErrorDomain Code=7004 "WatchConnectivity session has not been activated." UserInfo={NSLocalizedRecoverySuggestion=Activate the WatchConnectivity session., NSLocalizedDescription=WatchConnectivity session has not been activated., NSLocalizedFailureReason=Function activateSession has not been called.}
如何更改代码以解决此问题？
非常感谢，
马特