With which API can I check how many bytes in upload and download I transfer on Mac os x?

is there any api with which I can check how many bytes in upload and开发者_StackOverflow中文版 download I transfer on Mac os x?

If you mean that you want to make requests in your app and have an overview of the progress, I suggest you tu check out ASIHTTPRequest. It's an easy to use Objective-C wrapper around CFNetwork that offers a LOT of options and allows you to check the progress by setting a request delegate or using blocks. Check it out: http://allseeing-i.com/ASIHTTPRequest/