AFNetworking3.0 POST请求

  // 请求管理者
     AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
     manager.responseSerializer = [AFHTTPResponseSerializer serializer];

     // 拼接请求参数
     NSMutableDictionary *params = [NSMutableDictionary dictionary];
     params[@"client_id"] = @"";
     params[@"client_secret"] = @"240608336b729e27685af0ec496c1a60";
     params[@"grant_type"] = @"authorization_code";
     params[@"redirect_uri"] = @"http://";
     params[@"code"] = code;

     [manager POST:@"https://api.weibo.com/oauth2/access_token" parameters:params progress:^(NSProgress * _Nonnull uploadProgress) {

     } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
         NSLog(@"请求成功:%@", responseObject);

         NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];

         NSLog(@"请求成功JSON:%@", JSON);

     } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

         NSLog(@"请求失败:%@", error.description);

     }];