在Swift中发送json POST请求时返回读取json时出错

import Foundation

// 定义请求的URL和JSON数据
let url = URL(string: "https://example.com/api")
let jsonData = try? JSONSerialization.data(withJSONObject: yourJSONData, options: [])

// 创建POST请求
var request = URLRequest(url: url!)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData

// 发送网络请求
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let error = error {
        print("网络请求错误：\(error)")
        return
    }
    
    // 读取JSON响应
    do {
        let json = try JSONSerialization.jsonObject(with: data!, options: [])
        // 在这里处理JSON数据
    } catch {
        print("读取JSON时出错：\(error)")
    }
}

task.resume()