i am having application running on os3.0 i need to adopt this for ios4.0 wat are the major things i hav to take care... how can i do existing applicatio开发者_开发技巧n compatable to multitasking?
It's all in Apple's developer documentation.
http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html
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