NSURLConnection是否利用了NSURLCache？

// 创建一个缓存实例
let cacheSizeMemory = 500 * 1024 * 1024 // 500 MB
let cacheSizeDisk = 500 * 1024 * 1024 // 500 MB
let cache = URLCache(memoryCapacity: cacheSizeMemory, diskCapacity: cacheSizeDisk, diskPath: nil)

// 设置缓存实例
let config = URLSessionConfiguration.default
config.urlCache = cache

// 创建一个 URLSession 实例
let session = URLSession(configuration: config)

// 发送网络请求
let url = URL(string: "https://example.com")!
let task = session.dataTask(with: url) { (data, response, error) in
    // 处理响应
}
task.resume()