Swift - 为singleton设置委托 [英] Swift - set delegate for singleton

问题描述

我有这样的事情：

class SocketManager {
    static let instance: SocketManager
    var socket = Socket()
}

extension SocketManager: SocketDelegate {
    func someFunc() {
    }
}

Socket 是一个拥有协议的类和委托

protocol SocketDelegate: class {
    func someFunc()
}

class Socket {
    weak var delegate: SocketDelegate?
}

如何设置 socket.delegate 到 SocketManager.instance ？

推荐答案

你设置另一个类符合 SocketDelegate 协议并将委托设置为该类。一旦你这样做， SocketDelegate 就可以调用委托方法，这些方法将传递给你设置委托的类。

You set another class to conform to the SocketDelegate protocol and to set the delegate to that class. Once you do that, the SocketDelegate can call delegate methods which will be passed to the class that you set the delegate as.

你的课程将是这样的：

class SocketManager {
    static let instance: SocketManager
    var socket = Socket()
    weak var delegate: SocketDelegate?
}

extension SocketManager: SocketDelegate {
    func someFunc() {
    }
}

protocol SocketDelegate: class {
    func someFunc()
}

class Socket: SocketDelegate { // so it conforms to the delegate
    SocketManager.instance.delegate = self
}

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