swift - presenter 函数在 swift 3 上永远不会被读取

Question

我正在调用我的演示者功能，它列在我的演示者正在实现的协议(protocol)中，但无论何时我调用它，它都不会进入内部，我如何初始化我的演示者以便我可以调用界面函数？

这是我的 View Controller :

import UIKit

class FirstScreenViewController: UIViewController, MainViewProtocol {

    var myPresenter: MainPresenterProtocol?

    func outputPresenterFunction() {
       print (myPresenter?.presenterProtocolFuncTwo(numOne: 2, numTwo: 4, sucssesMessage: "Made it ?", failMessage: "failed :(" ) ?? "Default landed")
    }

}

在我的演示者中我有:

import Foundation

class MainPresenter: MainPresenterProtocol {

    var screenViewController: MainViewProtocol?

    func presenterProtocolFuncTwo(numOne: Int, numTwo: Int, sucssesMessage: String, failMessage: String) -> String {
        print("function is called")
        return "presenter function is called sussfuly"
    }

}

和我的协议(protocol)本身:

protocol MainViewProtocol {
    func showSmallHeadline(textToShow: String)
    func showHeadline(textToShow: String)
}

protocol MainPresenterProtocol {
    static func presenterProtocolFuncOne()
    func presenterProtocolFuncTwo(numOne: Int, numTwo: Int, sucssesMessage: String, failMessage: String) -> String
    func presenterProtocolFucThree () -> Bool
}

每当我调用 presenterProtocolFuncTwo 时，我都会得到我的默认值，它不会进入我的演示者的函数中

Answer 1

您应该使用 myPresenter 和 screenViewController 属性来使用它们。

protocol MainViewProtocol: class { ... }

class FirstScreenViewController: UIViewController, MainViewProtocol {
    var myPresenter: MainPresenterProtocol?

    override func viewDidLoad() {
        super.viewDidLoad()
        myPresenter = MainPresenter(controller: self)
    }
}

class MainPresenter: MainPresenterProtocol {
    weak var screenViewController: MainViewProtocol?

    init(controller: MainViewProtocol) {
        screenViewController = controller
    }
}