为什么不调用 appdelegate 中的函数？

Question

我正在尝试将当前用户添加到安装类，但由于某种原因该函数没有被调用。我究竟做错了什么？我该如何解决？下面是finishlaunchingwithoptions 和didregisterfornotifications。

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.



    Parse.enableLocalDatastore()

    // Initialize Parse.
    Parse.setApplicationId("***********************",
        clientKey: "****************************")




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

    if let launchOptions = launchOptions as? [String : AnyObject] {
        if let notificationDictionary = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as? [NSObject : AnyObject] {
            self.application(application, didReceiveRemoteNotification: notificationDictionary)
        }
    }

    return true
}

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    // Store the deviceToken in the current Installation and save it to Parse
    let installation = PFInstallation.currentInstallation()
    installation.setDeviceTokenFromData(deviceToken)
    installation["user"] = PFUser.currentUser()
    installation.saveInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
        if (error == nil){
            print("saved installation")
        }else{
            print(error)
        }
    })


}
func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError!) {
    print("Couldn't register: \(error)")
}

Answer 1

这种情况下的问题是你在 iOS 模拟器中运行，它不支持远程通知。因此，您的 didRegisterForRemoteNotificationsWithDeviceToken 将永远不会被调用，因为您在模拟器中。在设备上试一试，我怀疑它会第一次工作。

对于发现此问题并遇到类似问题的未来读者，诊断问题的最佳方法是将其添加到您的应用委托中：

func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
    print("Failed to register for remote notifications: \(error.localizedDescription)");
}

Answer 2

我建议在 Installation 类上使用 cloud code beforeSave trigger 来完成此操作。与尝试在客户端处理它相比，它非常简单且更强大。以下是完成工作所需的全部内容：

// Make sure all installations point to the current user
Parse.Cloud.beforeSave(Parse.Installation, function(request, response) {

    Parse.Cloud.useMasterKey();
    if (request.user) {
        request.object.set('user', request.user);
    } else {
        request.object.unset('user');
    }
    response.success();
});