Swift - 委托(delegate)协议(protocol)结构

Question

请原谅我对 swift 还很陌生。我想创建一个用于“POST”请求并从服务器获取响应的委托(delegate)。然后将从服务器返回的参数传递给 func 并允许我的主类相应地响应。下面是我的委托(delegate)和我的主要类(class)。它没有打印出 LoginViewController 类中的响应日志。我有点迷路，不知道哪里出了问题。非常感谢有关如何使它工作或更好的方法的建议/指示。谢谢!

委托(delegate)类

import Alamofire

protocol ServletDelegate {

   func responseSuccess(sender: Servlet, respArray : [String])

   func responseFail(sender: Servlet, respArray : [String])
} 

class Servlet : UIViewController{

    var delegate:ServletDelegate?

    //form 'data' parameter


    Alamofire.request(.POST, Config.flURL, parameters:["data" : ""]).responseData {
      response in
        print ("request \(response.request)")
        print ("response \(response.response)")
        print ("result \(response.result)")
        print ("data \(response.data)")

        let responseData = NSString (data: response.data!, encoding: NSUTF8StringEncoding)
        result = (responseData?.componentsSeparatedByString("~z0@"))!

        print("responseData :\(responseData)");
        print("result :\(result)");

        self.delegate?.responseSuccess(self, respArray: result);

}

主类

class LoginViewController: Servlet, UITextFieldDelegate, ServletDelegate {

    @IBAction func submitBtnAction(sender: UIButton) {

        Servlet().LoginUserHttp(tfUsername.text!, userPassword: tfPassword.text!);

    }

    func responseSuccess(sender: Servlet, respArray: [String]) {
        print("responseSuccess: \(respArray)");
    }

    func responseFail(sender: Servlet, respArray: [String]) {
        print("responseFail: \(respArray)");
    }

}

Answer 1

首先，您的 servlet 类不应该是 UIViewController，其次 - 不要使用 ;很快它是多余的，第三你没有设置委托(delegate)，第四是委托(delegate)应该是弱的，这样你就不会遇到强引用循环，第五我没有看到通过发送者的理由

顺便说一句，你可能应该传递一些带有响应失败委托(delegate)的错误对象，但这取决于你

委托(delegate)类

import Alamofire

protocol ServletDelegate: class {

   func responseSuccess(respArray : [String])

   func responseFail(respArray : [String])
} 

class Servlet {

    weak var delegate:ServletDelegate?

    //form 'data' parameter


    Alamofire.request(.POST, Config.flURL, parameters:["data" : ""]).responseData {
      response in
        print ("request \(response.request)")
        print ("response \(response.response)")
        print ("result \(response.result)")
        print ("data \(response.data)")

        let responseData = NSString (data: response.data!, encoding: NSUTF8StringEncoding)
        result = (responseData?.componentsSeparatedByString("~z0@"))!

        print("responseData :\(responseData)")
        print("result :\(result)")

        self.delegate?.responseSuccess(respArray: result)

}

主类

class LoginViewController: UIViewController, UITextFieldDelegate, ServletDelegate {


let servlet = Servlet()

@IBAction func submitBtnAction(sender: UIButton) {

/// im guessing you know what you are doing here, because we dont see that LoginUserHttp in your Servlet code        
servlet.LoginUserHttp(tfUsername.text!, userPassword: tfPassword.text!)

    }
override func viewDidLoad() {
    servlet.delegate = self
}

func responseSuccess(respArray: [String]) {
        print("responseSuccess: \(respArray)")
    }

    func responseFail(respArray: [String]) {
        print("responseFail: \(respArray)")
    }

}