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POSilent Push Notification in iOS 7 does not work
 

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    <p>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.</p> <pre><code>// A. This doesn't work { aps: { content-available: 1 } } </code></pre> <p>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).</p> <pre><code>// B. This works { aps: { content-available: 1, sound: "default" } } </code></pre> <p>However, if I change the sound attribute to play a silent audio, I can mimic a silent push.</p> <pre><code>// C. This works too. { aps: { content-available: 1, sound: "silence.wav" } } </code></pre> <p>Does anyone know:</p> <ol> <li>If this a bug?</li> <li>And if it is correct to assume that B or C is being treated as a Remote Notification (and not a bug with Silent Push where you need a sound attribute)? If so, this means it is not rate limited like Silent Pushes are... which Apple will likely fix. So I probably should not rely on it.</li> <li>What the rate limit is (N pushes every X seconds, etc)?</li> </ol> <p>Thanks in advance.</p> <p><strong>Edit with more information</strong></p> <p>For A, the state of the application does not matter. Notification is never received.</p> <p>It seems like B and C only work if you enclose the attributes and values in quotes, like below.</p> <pre><code>{"aps":{"content-available": 1, "sound":"silent.wav"}} </code></pre> <p>And the notification arrives in <strong>application:didReceiveRemoteNotification:fetchCompletionHandler:</strong> regardless of state.</p>
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    1. CODoes it not work in any app state? For me, "**A**" works as long as the app is running in foreground (didReceiveRemoteNotification gets called). But when the app is not running, the app is not getting notified (I just hear the sound, when I try "**B**"). Does your app get woken up (didReceiveRemoteNotification) in background when you use "**B**" or "**C**"?
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    2. COI'm seeing similar behavior, im thinking it might be because i've been trying this for a while and i didn't have the app set up correctly at first so Apple may have throttled me before i had the setup correct.
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    3. CODude... I wish I could give you 10 votes
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