如何在swift中创建类似于我的kotlin拦截器？

// 定义一个拦截器协议
protocol Interceptor {
    func intercept(request: URLRequest) -> URLRequest
}

// 实现一个具体的拦截器
struct LoggingInterceptor: Interceptor {
    func intercept(request: URLRequest) -> URLRequest {
        print("LoggingInterceptor: \(request)")
        return request
    }
}

// 定义一个网络请求类
class NetworkClient {
    var interceptor: Interceptor?
    
    func sendRequest(request: URLRequest) {
        // 在发送请求之前，先调用拦截器对请求进行处理
        if let interceptor = interceptor {
            let interceptedRequest = interceptor.intercept(request: request)
            // 发送拦截后的请求
            // ...
        } else {
            // 没有拦截器时直接发送请求
            // ...
        }
    }
}

// 使用示例
let client = NetworkClient()
client.interceptor = LoggingInterceptor()

let request = URLRequest(url: URL(string: "https://example.com")!)
client.sendRequest(request: request)