swift URLRequest不发送参数

if let url = URL(string: "https://example.com/api/endpoint") {
    var request = URLRequest(url: url)
    request.httpMethod = "GET"
    
    let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print("Error: \(error)")
        } else if let data = data {
            // 处理返回的数据
            print("Response: \(data)")
        }
    }
    task.resume()
}

if let url = URL(string: "https://example.com/api/endpoint") {
    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    
    let parameters = ["key1": "value1", "key2": "value2"]
    request.httpBody = parameters.percentEncoded()
    
    let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print("Error: \(error)")
        } else if let data = data {
            // 处理返回的数据
            print("Response: \(data)")
        }
    }
    task.resume()
}

extension Dictionary {
    func percentEncoded() -> Data? {
        return map { key, value in
            let escapedKey = "\(key)".addingPercentEncoding(withAllowedCharacters: .urlQueryValueAllowed) ?? ""
            let escapedValue = "\(value)".addingPercentEncoding(withAllowedCharacters: .urlQueryValueAllowed) ?? ""
            return escapedKey + "=" + escapedValue
        }
        .joined(separator: "&")
        .data(using: .utf8)
    }
}

extension CharacterSet {
    static let urlQueryValueAllowed: CharacterSet = {
        var allowed = CharacterSet.urlQueryAllowed
        allowed.remove(charactersIn: "&")
        return allowed
    }()
}