摘要： 同步访问时的取法NSURL*url=[NSURLURLWithString:@"http://www.test.com"];NSURLRequest*request=[NSURLRequestrequestWithURL:url];NSHTTPURLResponse*response;[NSURLConnectionsendSynchronousRequest:requestreturningResponse:&responseerror:nil];if([responserespondsToSelector:@selector(allHeaderFields)]) 阅读全文