是否可以在获得初始权限后向 UIUserNotificationCategory 添加新操作？

Question

背景

我有一个 iOS 消息传递应用程序，具有现有的已安装用户群。
我已经要求用户/获得了系统级通知权限（也就是，我已经调用 UIApplication.sharedApplication().registerUserNotificationSettings 类别/操作）。
iOS 9 offers a new property on UIMutableUserNotificationAction called behavior which allows for in-line replies via the .TextInput option.

问题

在 iOS 9 发布后，我想 "upgrade" 我的用户并支持这个新的 "in-line reply" 推送通知选项......但显然我首先需要 向每个用户的UIApplication.sharedApplication().currentUserNotificationSettings()

添加一个新的UIMutableUserNotificationAction（具有新行为属性）

问题

由于我已经拥有一般通知权限（徽章/声音/警报），我可以安静地重新执行UIApplication.sharedApplication().registerUserNotificationSettings并添加新的"in-line reply"行动？

Answer 1

事实证明，您不能简单地调用 UIApplication.sharedApplication().registerUserNotificationSettings 并添加一个新的动作——那样做将注册仅单个的新动作（并打击离开你所有的人）。

这是我在 application: didFinishLaunchingWithOptions 中所做的：

注意：我使用 count < 2 的逻辑检查，因为在我的应用程序的先前版本中，我只在目标类别 ("REPLY_CATEGORY") 中建立了一个操作。

// This code ensures that iOS 9 Users (especially iOS 8 ==> iOS 9 upgraders) will be able to see
//  iOS 9's new text input 'behavior', available for notifications quick-actions
if #available(iOS 9, *) {
  if NSUserDefaults.standardUserDefaults().boolForKey("asked_for_notification_permission") {
    let settings: UIUserNotificationSettings = UIApplication.sharedApplication().currentUserNotificationSettings()!

    for category in settings.categories! {
      let cat: UIUserNotificationCategory = category 
      if cat.identifier == "REPLY_CATEGORY" {
        if cat.actionsForContext(UIUserNotificationActionContext.Default)!.count < 2 {
          print("! aD: iOS 9 User has less than the expected reply actions")

          // Re-build entire categories / actions here, including
          //   the new action with .behavior = .TextInput
          // THEN, simply re-register:

          let notificationCategories = NSSet(array: allCategories)
          let settings: UIUserNotificationType = [.Sound, .Alert, .Badge]

          UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotificationSettings(forTypes: settings, categories: (notificationCategories as! Set<UIUserNotificationCategory>)))

        }
      }
    }
  }
}

是否可以在获得初始权限后向 UIUserNotificationCategory 添加新操作？

Is it possible to add a new action to UIUserNotificationCategory after obtaining initial permission?

notifications

ios

swift

ios9