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"] = @"2331570398";
    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);

    }];