我有同样的问题，后来我发布了详细的问题。幸运的是，我发现了这个问题，现在它正在为我工​​作。我没有发送适当格式的数据，这些格式在我以适当的格式发送数据后正常工作。我的JSON格式看起来像这样。

  {
通知：{
徽章：12，
 alert：default，
sound：default，
title：default
}，
content_available：true，
to：YOUR_KEY_HERE
} 
 

由于没有可用的详细信息你的服务器实现。你可以参考我的问题获取更多信息。

GCM将内容推送到iOS的通知（无法从非活动状态调用）

Hello all i am integrating GCM in iOS application using following link

https://developers.google.com/cloud-messaging/ios/start.

I have also uploaded the certificates when configuring the file on defined steps.

I have also succeeded for getting notification,but the problem is that i am not getting the notification when the application is killed or in background.Is there any implementation for getting notification in background or killed ios application as i have searched a lot for that and nothing found fruitful.

So any help will be appreciated Thanks..

I had same problem and I posted detailed question later. Luckily, I figured out the problem and it is working for me now. I was not sending data in proper format that got working after I sent data in proper format. My JSON format looks like this.

{
"notification":{
"badge":"12",
"alert":"default",
"sound":"default",
"title":"default"
},
"content_available":true,
"to":"YOUR_KEY_HERE"
}

Since there isn't details available on your sever implementation. you can refer my question for more information.

GCM push notification to iOS with content_available (not working to invoke from inactive state)