cocoa touch - How to receive async network message while the iphone app is running in background

Question

I have an iphone app receiving network message from server. It is ok when the app is running in frontend.

However, when the app is running in background, the app does not receive network message. After I bring it back to frondend, it starts receiving.

How to make the app can receive network message even it is running in background?

Thanks.

Answer 1

You've got two options for network connection while in the background:

• Push Notifications. The app is not running, but your server can request to send a notification, which will then be sent to the iPhone, prompting the user to launch your app which can then update itself from your server thru a regular request.

• Background network calls. Your app can request to keep a thread alive in the background in order to finish a network activity. You could use this to send a request when your app closes to check in with your server.