设备如何接收推送通知？ -iPhone SDK

Question

I want to ask you guys How device receives push notification? Is our device continuously connected to apple's server?

Many Thanks,
Nav

Answer 1

Device does not remain connected. In fact the app might not even be running any more.

The mechanism is as follows:

1. Your application has to register for notifications.
2. When it registers you get a token, which you send to your server.
3. When you wish to send a push notification, your server connects to Apple server and sends a message to the previously registered token.

Simple :)

For more details see: http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/ApplePushService/ApplePushService.html#//apple_ref/doc/uid/TP40008194-CH100-SW9

Answer 2

在此链接中，您可以了解推送通知服务的工作方式。