iPhone - How to find NSURLConnection started or not?

There's a delegate in NSURLConnection "- (void)connectionDidFinishLoading:(NSURLConnection *)connection"开发者_开发问答

This will be called when the connection finishes. But is there any delegate or way to know when the connection has started.

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What you're looking for is the NSURLConnection delegate method connection:willSendRequest:redirectResponse:. It will be called once when the connection starts, but be warned that it will be called again for every redirect response (if there are any).

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- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

can be used.