How to get iPad/iPhone Cellular Network Data >Sent/Received Usage so my app doesn't kill users Data Plan

The iPad is coming to the Uk and so are the expensive data plans.

My app downloads large pdf files.

I prompt the user if they are on 3g if they wish to continue but it there any way to access the IPhone setting for data downloaded so I could do a before/after.开发者_开发知识库

Im looking for

IPhone > Settings > General > Usage > Cellular Network Data > Sent/Received

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There's no way to access this information from inside your application. You could just measure the size of the file(s) you download, and display that.

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On 3.x, these are got using the private functions CTRegistrationDataCounterGet***Statistics in Core Telephony framework.

(And even Core Telephony becomes public in 4.0, this is still a private function.)