制作飞镖忍者(1) Cocos2d-x 3.0alpha0(4)

        this->scheduleUpdate();

11.编译运行，这时当子弹和怪物碰撞时，它们就会消失；
12.接下来，创建一个新的场景，来指示"You Win"或者"You Lose"。创建新类

GameOverLayer.h文件代码为：

#include "cocos2d.h"
USING_NS_CC;

class GameOverLayer:public LayerColor{
    
public:
    GameOverLayer();
    ~GameOverLayer();
    
    
    
    bool initWithWon(bool won);
    static Scene* sceneWithWon(bool won);
    void gameOverDone();
};

GameOverLayer.cpp文件代码为：

//
//  GameOverLayer.cpp
//  HelloCpp
//
//  Created by 杜甲 on 13-12-1.
//
//

#include "GameOverLayer.h"
#include "HelloWorldScene.h"

GameOverLayer::GameOverLayer()
{
    
}
GameOverLayer::~GameOverLayer()
{
    
}
GameOverLayer* GameOverLayer::createWithWon(bool won)
{
    GameOverLayer* pRet = new GameOverLayer();
    if (pRet && pRet->initWithWon(won)) {
        
    }
    else{
        CC_SAFE_RELEASE_NULL(pRet);
    }
    return pRet;
}

bool GameOverLayer::initWithWon(bool won)
{
    bool bRet = false;
    do {
        CC_BREAK_IF(!LayerColor::initWithColor(Color4B(255, 255, 255, 255)));
        
        char* message;
        if (won) {
            message  = "You Won";
        }
        else
        {
            message = "You Lose";
        }
        Size winSize = Director::getInstance()->getWinSize();
        LabelTTF* label = LabelTTF::create(message, "Arial", 32);
        label->setColor(Color3B(0, 0, 0));
        label->setPosition(Point(winSize.width / 2, winSize.height / 2));
        this->addChild(label);
        
        this->runAction(Sequence::create(DelayTime::create(3),
                                         CallFunc::create(std::bind(&GameOverLayer::gameOverDone, this)), NULL));
        bRet = true;
    } while (0);
    return bRet;
}

Scene* GameOverLayer::sceneWithWon(bool won)
{
    Scene* scene = NULL;
    do {
        scene = Scene::create();
        
        CC_BREAK_IF(!scene);
        
        GameOverLayer* layer = GameOverLayer::createWithWon(won);
        CC_BREAK_IF(!layer);
        scene->addChild(layer);
        
    } while (0);
    return scene;
    
}
void GameOverLayer::gameOverDone()
{
    Director::getInstance()->replaceScene(HelloWorld::createScene());
    
}

游戏结束时，切换到以上所建的场景，场景上的层显示一个文本，在3秒之后返回到HelloWorld场景中。
13.最后，为游戏添加一些游戏逻辑。记录玩家消灭怪物的数量，进而决定该玩家输赢。在HelloWorldScene.h文件中，添加如下：

    int _monstersDestroyed;

添加头文件引用：

#include "GameOverLayer.h"

在update定时函数中，monstersToDelete循环removeChild(monster, true)的后面添加被消灭怪物的计数，并判断胜利条件，代码如下：

            _monstersDestroyed++;
            if (_monstersDestroyed > 2) {
                Scene* gameOverScene = GameOverLayer::sceneWithWon(true);
                Director::getInstance()->replaceScene(gameOverScene);
            }