[cocos2dx]实例认识分析MVC模式

mvc模式

Model(模型)：一般负责数据的处理
View(视图)：一般负责界面的显示
Controller(控制器)：一般负责前端的逻辑处理

实例

捉虫游戏，背景介绍：两类虫(蚂蚁和蜘蛛)进洞超过3个，玩家就失败。

在实际开发中，我遇到的头疼麻烦的事，不知道M、V、C他们之间的调用是怎样的？

M模型

BugAnt和BugSpider都继承BugBase.

V视图

1.视图BugSprite依赖模型BugBase

function GameView:addBug()
    local bugType = BugBase.BUG_TYPE_ANT
    if math.random(1,2) % 2 == 0 then
        bugType = BugBase.BUG_TYPE_SPIDER
    end

    local bugModel
    if bugType == BugBase.BUG_TYPE_ANT then
        bugModel = BugAnt:create()
    else
        bugModel = BugSpider:create()
    end

    local bug = BugSprite:create(GameView.IMAGE_FILENAMES[bugType],bugModel)
        :start(GameView.HOLE_POSITION)
        :addTo(self.bugsNode_,GameView.ZORDER_BUG)

    self.bugs_[bug] = bug
    return self
end

2.帧率刷动---虫子的生产和爬动，及进洞

function GameView:step(dt)
    if self.lives_ <= 0 then return end

    self.addBugInterval_ = self.addBugInterval_ - dt
    if self.addBugInterval_ <= 0 then
        self.addBugInterval_ = math.random(GameView.ADD_BUG_INTERVAL_MIN,GameView.ADD_BUG_INTERVAL_MAX)
        self:addBug()   -- 随机生成虫子
    end

    for _,bug in pairs(self.bugs_) do
        bug:step(dt)    -- 虫子爬动
        if bug:getModel():getDist() <= 0 then
            self:bugEnterHole(bug)  -- 进入洞穴
        end
    end

    return self
end

function GameView:bugEnterHole(bug)
    self.bugs_[bug] = nil

    bug:fadeOut({time = 0.5,removeSelf = true})
        :scaleTo({time = 0.5,scale = 0.3})
        :rotateTo({time = 0.5,rotation = math.random(360,720)})

    self.lives_ = self.lives_ - 1
    self.livesLabel_:setString(self.lives_)
    audio.playSound("BugEnterHole.wav")

    if self.lives_ <= 0 then
        self:dispatchEvent({name = GameView.events.PLAYER_DEAD_EVENT})
    end

    return self
end

3.手击中虫子

function GameView:onTouch(event)
    if event.name ~= "began" then return end
    local x,y = event.x,event.y
    for _,bug in pairs(self.bugs_) do
        if bug:getModel():checkTouch(x,y) then
            self:bugDead(bug)
        end
    end
end

function GameView:bugDead(bug)
    local imageFilename = GameView.IMAGE_FILENAMES[bug:getModel():getType()]
    DeadBugSprite:create(imageFilename)
    :fadeOut({time = 2.0,delay = 0.5,removeSelf = true})
    :move(bug:getPosition())
    :rotate(bug:getRotation() + 120)
    :addTo(self.bugsNode_,GameView.ZORDER_DEAD_BUG)

    self.bugs_[bug] = nil
    bug:removeSelf()

    self.kills_ = self.kills_ + 1
    audio.playSound("BugDead.wav")

    return self
end

参考：我所理解cocos2d-x 3.6 lua -- 初识MVC