iPhone: how to send image data to server using JSON?

I am newbie iphone developer, I am using JSON to send and retrieve data from server. But I used to work with text between iPhone and server. Now I would like to send image data from iPhone to server and vice versa, retrieve image data fr开发者_运维问答om server database to iphone. Can anyone show me how I can accomplish this?

Thanks

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Encode your image with base64, then send the base64 string as json. On the serverside decode the base64 again and save it or do whatever you want with it