ios - Apple 的静默推送通知能否在后台启动我的应用程序？

Question

根据 Apple 的文档，我可以通过在 aps 有效负载字典中添加 "content-available"= 1 键值来注册静默通知。我希望我的应用程序在静默通知到达时在后台唤醒。我在我的 info.plist 中将 App downloads content in response to push notifications 值设置为 Required background modes

这是我的有效负载字典

{"aps":
      {
       "alert":"Notification alert","badge":1,"sound":"default","content-available":1
      }
}

我在 -(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler 中收到回调
当我的应用程序处于后台时。但我的问题是，当我们的应用程序处于终止状态时，我们能否获得对此方法或任何其他方法的回调？

我不希望我的应用用户看到通知，但我希望我的应用通过静默通知在后台唤醒它来执行某些任务。

如有任何建议，我们将不胜感激。

Answer 1

当设备收到设置了 content-available 的推送消息时，Apple 会在后台启动您的应用。用户不会意识到这一点。 From the docs :

content-available: Provide this key with a value of 1 to indicate that new content is available. Including this key and value means that when your app is launched in the background or resumed, -application:didReceiveRemoteNotification:fetchCompletionHandler: is called.

同样来自 docs

didReceiveRemoteNotification: However, the system does not automatically launch your app if the user has force-quit it. In that situation, the user must relaunch your app or restart the device before the system attempts to launch your app automatically again.