IOS用AFN发送字符串形式的Json数据给服务器实例

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];  // 发送post请求//  manager.responseSerializer = [AFJSONResponseSerializer serializer];  manager.responseSerializer = [AFJSONResponseSerializer serializer];  manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];  //  manager.requestSerializer=[AFHTTPRequestSerializer serializer];  NSDictionary *json = [NSDictionary dictionary];   NSString *str = [NSString stringWithFormat:@"{/"city/":/"%@/",/"country/":/"%@/",/"headimgurl/":/"%@/",/"language/":/"%@/",/"openid/":/"%@/",/"province/":/"%@/",/"sex/":%@,/"unionid/":/"%@/",/"userName/":/"%@/"}",self.userInfoDict[@"city"],self.userInfoDict[@"country"],self.userInfoDict[@"headimgurl"],self.userInfoDict[@"language"],self.userInfoDict[@"openid"],self.userInfoDict[@"province"],self.userInfoDict[@"sex"],self.userInfoDict[@"unionid"],self.userInfoDict[@"nickname"]];  json = @{//      @"city":self.userInfoDict[@"city"],//      @"country":self.userInfoDict[@"country"],//      @"headimgurl":self.userInfoDict[@"headimgurl"],//      @"language":self.userInfoDict[@"language"],//      @"openid":self.userInfoDict[@"openid"],//      @"province":self.userInfoDict[@"province"],//      @"sex":self.userInfoDict[@"sex"],//      @"unionid":self.userInfoDict[@"unionid"],//      @"userName":self.userInfoDict[@"nickname"],      @"json":str,//      @"json":@"json"                };  NSLog(@"post调试%@",json);  NSString *URLStr = @"http://10.62.16.247:8080/LoginServlet.bmh";    [manager POST:URLStr parameters:json progress:^(NSProgress * _Nonnull uploadProgress) {      } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {    NSString *str = responseObject;    NSLog(@"post回调====%@",str);    NSLog(@"post成功");  } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {    NSLog(@"post失败");  }];