Xcode、Parse - 处理远程通知

Question

我正在尝试按照解析指南来处理我以 Json 格式发送的通知，但我遇到了问题，这是我的代码:

  func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
        // Override point for customization after application launch.
        Parse.setApplicationId("MyAppId", clientKey: "MyAppClientKey")

        var notificationType: UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound

        var settings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes: notificationType, categories: nil)
        UIApplication.sharedApplication().registerUserNotificationSettings(settings)
        UIApplication.sharedApplication().registerForRemoteNotifications()

if let launchOptions = launchOptions {
    var notificationPayload: NSDictionary = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as NSDictionary!
    println(launchOptions)

    var url = notificationPayload["url"] as String

    var feed: FeedTableViewController = FeedTableViewController()
    feed.messages.insert(url, atIndex: 0)
    feed.sections.insert("section", atIndex: 0)
    }


        return true
    }

应用程序现在没有崩溃，但我所做的更改没有生效。 json代码:

{
    "aps": {
         "badge": 10,
         "alert": "Test",
         "sound": "cat.caf"
    },
    "url": "http://www.google.com"
}

Answer 1

我猜你的问题出在这里:

launchOptions(UIApplicationLaunchOptionsRemoteNotificationKey) as NSDictionary 

我不确定您在期待什么，但据我所知，字典上没有这样的方法。您可能正在寻找下标语法。像这样:

launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as NSDictionary 

获取嵌套在键下的 launchOptions 字典中的字典:UIApplicationLaunchOptionsRemoteNotificationKey。

也就是说，launchOptions 可能为 nil，您应该在代码中添加该检查，并且尝试记录 launchOptions 并在此处发布结果。

您可以像这样检查 launchOptions 是否为 nil:

if let launchOpts = launchOptions {
    var notificationPayload: NSDictionary = launchOpts.objectForKey(UIApplicationLaunchOptionsRemoteNotificationKey) as NSDictionary
}