目录

一、练习题

二、小结

一、练习题

1. 模拟网游玩家在“牺牲”后，返回先前的复活点场景。

类图

核心代码

package DesignPattern.memento

public class Player {
    public Player(var name: String, public var x: Int64, public var y: Int64) {}

    public func save() {
        return PlayMemento(this.name, this.x, this.y)
    }

    public func restore(playerMemento: PlayMemento) {
        this.name = playerMemento.name
        this.x = playerMemento.x
        this.y = playerMemento.y
        println("玩家${this.name}死亡, 返回前一个位置: (${this.x}, ${this.y})")
    }

    public func show() {
        println("玩家${this.name}当前位置为: (${this.x}, ${this.y})")
    }
}

// 备忘录类
public class PlayMemento {
    public PlayMemento(var name: String, var x: Int64, var y: Int64) {}
}

// 负责人
public class Director {
    public Director(public var playerMemento: PlayMemento) {}
}

测试代码

package DesignPattern
import DesignPattern.memento.*

main(): Int64 {
    let player = Player("常长老", 55, 99)
    let director = Director(player.save())
    player.show()
    player.x = 45
    player.y = 50
    player.show()
    // 保存状态
    director.playerMemento = player.save()
    player.x = -90
    player.show()
    player.restore(director.playerMemento)
    return 0
}

二、小结

本章为大家详细的介绍了仓颉设计模式中备忘录模式练习题的内容，下一章，为大家带来观察者模式的内容。最后，创作不易，如果大家觉得我的文章对学习仓颉设计模式有帮助的话，就动动小手，点个免费的赞吧！收到的赞越多，我的创作动力也会越大哦，谢谢大家🌹🌹🌹！！！