PubNub iOS应用程序不接收推送通知

Question

我正在iOS8+上使用最新的试用版PubNub，Xcode7.3，试图建立一个聊天应用程序。我正在评估PubNub作为另一个聊天服务器的替代方案。

我遵循了PubNub文档中关于苹果推送通知的说明，但我的应用程序在后台时从不接收推送通知。

我已经创建了p12证书并将其导入到PubNub密钥集中。我在Xcode常规设置中启用了推送通知。我已经编写了PubNub文档中指定的Swift代码。我能够成功发布和订阅，但我的应用程序（application：UIApplication,didRegisterForRemoteNotificationsWithDeviceToken DeviceToken：NSData）方法显示给我一个'nil'标记。

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, PNObjectEventListener {
    var window: UIWindow?
    // Instance property
    var client: PubNub?

    // For demo purposes the initialization is done in the init function so that
    // the PubNub client is instantiated before it is used.
    override init() {

        // Instantiate configuration instance.
        let configuration = PNConfiguration(publishKey: "mypubkey", subscribeKey: "mysubkey")
        // Instantiate PubNub client.
        client = PubNub.clientWithConfiguration(configuration)
        super.init()
        client?.addListener(self)
    }

和：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
self.client?.subscribeToChannels(["my_channel"], withPresence: true)

let types: UIUserNotificationType = [.Badge, .Sound, .Alert]
let mySettings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes:types, categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(mySettings)
UIApplication.sharedApplication().registerForRemoteNotifications()

return true
}

并且在我的推送通知注册方法中：

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    NSUserDefaults.standardUserDefaults().setObject(deviceToken, forKey: "DeviceToken")
    NSUserDefaults.standardUserDefaults().synchronize()
    print("Device Token=\(NSString(data: deviceToken, encoding:NSUTF8StringEncoding))")
    self.client?.addPushNotificationsOnChannels(["my_channel"],
       withDevicePushToken: deviceToken,
       andCompletion: { (status) -> Void in
    ...
    })
}

print方法显示deviceToken为nil。

Answer 1

您没有任何麻烦与您的注册代码以及设备令牌。设备令牌是二进制的，无法用NSUTF8StringEncoding编码转换为字符串。您可以使用断点来验证有什么值，但call of success delegate本身就是您的应用程序从Apple收到了正确的设备推送令牌的证明。

要接收推送通知，您需要使用允许指定APNS有效负载的适当发布方法。下面是方法之一：https://www.pubnub.com/docs/swift/api-reference#publish_arg_6 payload应该设置为有效的APNS payload dictionary（按照Apple规范）。