Recently, I have been studying the application of online playback,
The main idea is
1. Knowledge about cfnetwork. framework is required for HTTP data download.
2. Learn about audio file stream service and audio queue service in audiotoolbox. Framework to parse and play data.
Collected references
Http://salahuddin66.blogspot.com/2010/02/radio-app-example-iphone.html
Http://cocoawithlove.com/2009/06/revisiting-old-post-streaming-and.html
Audiostream: Http://developer.apple.com/library/ios/#documentation/MusicAudio/Reference/AudioStreamReference/Reference/reference.html
Audioqueue: Http://developer.apple.com/library/ios/#documentation/MusicAudio/Conceptual/AudioQueueProgrammingGuide/Introduction/Introduction.html
Cfnetwork: Http://developer.apple.com/library/ios/#documentation/Networking/Conceptual/CFNetwork/Introduction/Introduction.html