Swift委托代理实现

最新推荐文章于 2022-09-14 18:25:35 发布

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本文通过具体的Swift代码示例，介绍了如何使用协议、结构体和类来实现打印功能，并展示了如何通过继承扩展协议的功能。此外，还演示了如何利用这些组件在不同上下文中进行交互。

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import Foundation

//协议
protocol  Print {
    var name: String {set get}
    init(name: String)
    func printContents(content:String) -> Void

}
//协议继承
protocol Show:Print {
    func show() -> Void
}

struct LenovePrinter: Print {
    var name: String = ""
    init(name: String) {
        self.name = name
    }
    func printContents(content:String) -> Void {
        print("爱普生打印内容:\(content)")
        print("++++++++++++++++++++++++++++")
        print(content)
        print("++++++++++++++++++++++++++++")
    }
}

//代理类
class HPPrinter: Show {
    func show() {
        print("*******")
    }
    var name: String = ""
    required init(name: String) {
        self.name = name
    }
    func printContents(content:String) -> Void {
        print("HP打印内容:\(content)")
        print("----------------------------")
        print(content)
        print("----------------------------")
    }
}
//代理类
class EsponPrinter: Print {
    var name: String = ""
    required init(name: String) {
        self.name = name
    }
}
//在延展中实现协议中没有实现的方法
extension EsponPrinter {
    func printContents(content:String) -> Void {
        print("爱普生打印内容:\(content)")
        print("++++++++++++++++++++++++++++")
        print(content)
        print("++++++++++++++++++++++++++++")
    }
}
//委托类
class Computer {
    func showMessage(printer:Print,content: String) -> Void {
        printer.printContents(content: content)
    }
}


var hpPrinter = HPPrinter(name:"3337")
var esponPrinter = EsponPrinter(name:"1005")

//协议数组
var arr:[Print] = [hpPrinter,esponPrinter]


var computer = Computer()

computer.showMessage(printer:esponPrinter,content:"久久鸭脖")
computer.showMessage(printer:hpPrinter,content:"久久鸭脖")


protocol P1 {
    func kkk() -> Void
}
protocol Maaa:class,P1 {
    func sss() -> Void
}

class TestOne: Maaa {
    func sss() {
    }
    func kkk() {
    }
}
//struct Test: Maaa {
//    func sss() {
//    }
//    func kkk() {
//    }
//}