iOS 7中的静默推送通知不起作用 [英] Silent Push Notification in iOS 7 does not work

问题描述

在WWDC 2013的多任务新功能演示中，有一节关于静音推送通知。这似乎是直截了当的。根据演示文稿，如果您将APS有效负载仅发送到内容可用设置为1，则不会通知用户该通知。

In the WWDC 2013's "What's New with Multitasking" presentation, there is a section about Silent Push Notifications. It seems straight forward. According to the presentation, if you send the APS payload with just the content-available set to 1, users will not be notified of the notification.

// A. This doesn't work
{ 
  aps: { 
          content-available: 1 
       }
}

我的测试显示这不起作用，因为没有收到推送。但是，如果我包含声音属性但排除了alert属性，它就会起作用（虽然不再是静音）。

My testing shows that this does not work as no push is received. But if I include the sound attribute but exclude the alert attribute, it works (though not silent anymore).

// B. This works
{ 
  aps: {
          content-available: 1,
          sound: "default"
       }
}

但是，如果我更改声音属性以播放静音，我可以模仿静音推送。

However, if I change the sound attribute to play a silent audio, I can mimic a silent push.

// C. This works too.
{ 
  aps: {
          content-available: 1,
          sound: "silence.wav"
       }
}

有谁知道：

1. 如果这样一个错误？


2. 如果假设B或C被视为远程通知是正确的（而不是Silent Push的错误，你需要一个声音属性）？如果是这样，这意味着它没有像Silent Pushes那样的速率限制...... Apple可能会解决这个问题。所以我可能不应该依赖它。


3. 什么是速率限制（N每推X秒等）？

提前致谢。

使用更多信息进行编辑

对于A，应用程序的状态无关紧要。永远不会收到通知。

For A, the state of the application does not matter. Notification is never received.

如果您将属性和值括在引号中，B和C似乎只能起作用，如下所示。

It seems like B and C only work if you enclose the attributes and values in quotes, like below.

{"aps":{"content-available": 1, "sound":"silent.wav"}}

通知到达应用程序：didReceiveRemoteNotification：fetchCompletionHandler：，无论状态如何。

And the notification arrives in application:didReceiveRemoteNotification:fetchCompletionHandler: regardless of state.

推荐答案

当它到达时它也有效并且没有发出声音：

This works also and does not play a sound when it arrives:

{
    aps = {
        "content-available" : 1,
        sound : ""
    };
}

编辑

遇到此问题的人可能需要查看此链接。我一直在参与Apple开发者论坛上的一个主题，该主题遍及所有应用程序状态，并且收到静态推送但未收到。

People having this problem may want to check out this link. I have been participating in a thread on Apple's Developer forum that goes over all app states and when silent pushes are received and not received.

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