//设置HTTP 内容长度
,,,NSString * lenStr =, (NSString stringWithFormat: @ % ld, request.HTTPBody.length);
,,,(request setValue: lenStr forHTTPHeaderField: @“内容长度”);
,,,,
,,,//设置HTTP 内容类型
,,,(request setValue: formData.contentType forHTTPHeaderField: @“内容类型”);
,,,,
,,,//5。发送请求
,,,(NSURLConnection sendAsynchronousRequest: request 队列:[NSOperationQueue mainQueue], completionHandler: ^ (NSURLResponse *响应,NSData *数据,NSError * connectionError), {
,,,,,,//处理请求结果
,,,}];
