NSMutableURLRequest的响应不包含该信息

// 创建URL对象
let url = URL(string: "https://example.com/api")

// 创建请求对象
let request = NSMutableURLRequest(url: url!)

// 设置请求方法
request.httpMethod = "GET"

// 创建会话配置对象
let config = URLSessionConfiguration.default

// 创建会话对象
let session = URLSession(configuration: config)

// 发送请求
let task = session.dataTask(with: request as URLRequest) { (data, response, error) in
    if let error = error {
        print("请求失败：\(error.localizedDescription)")
        return
    }
    
    // 获取响应
    if let httpResponse = response as? HTTPURLResponse {
        let statusCode = httpResponse.statusCode
        let headers = httpResponse.allHeaderFields
        
        // 处理响应数据
        if let data = data {
            // 解析数据
            let responseString = String(data: data, encoding: .utf8)
            
            // 处理响应结果
            print("请求成功，状态码：\(statusCode)")
            print("响应头：\(headers)")
            print("响应数据：\(responseString ?? "")")
        }
    }
}

// 启动任务
task.resume()