本来常用的是application/json的这中格式，做ios常用的网络请求框架AFNetworking，默认也是application/json，前不久就遇到这种接受格式问题，按照网上各种说法，改了AFNetworking的设置，最终还是无法解决问题，最后也放弃了使用AFNetworking。写了个原生的网络请求就解决了问题。
代码如下：
NSHTTPURLResponse *response = nil;
NSError *erro = nil;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:urlStr]];
request.HTTPMethod = @"POST";
//设置格式
[request addValue:@"application/x-www-form-urlencoded ;charset=utf-8" forHTTPHeaderField:@"Content-Type"];
//
[request addValue:@"" forHTTPHeaderField:@"x-wh-token"];
//用HMAC加密
NSString *serkey = [NSString hmacsha1:@"" key:key];
[request addValue:serkey forHTTPHeaderField:@"x-wh-signature"];
[request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
NSData *requesData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&erro];