将cURL命令行转换为Swift cURL不起作用

import Foundation

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

// 创建请求对象
var request = URLRequest(url: url)

// 设置请求方法
request.httpMethod = "POST"

// 设置请求头
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.setValue("Bearer your-access-token", forHTTPHeaderField: "Authorization")

// 设置请求体
let parameters = ["key1": "value1", "key2": "value2"]
request.httpBody = try? JSONSerialization.data(withJSONObject: parameters)

// 创建URLSession对象
let session = URLSession.shared

// 发送请求
let task = session.dataTask(with: request) { (data, response, error) in
    if let error = error {
        print("请求失败：\(error)")
        return
    }
    
    if let data = data {
        // 处理响应数据
        let responseString = String(data: data, encoding: .utf8)
        print("响应数据：\(responseString ?? "")")
    }
}

task.resume()