cocos3.2学习微信打飞机

先下个效果图：

这个是从网上下载的例子，用来学习的。。。

用到的类有上面这些：接下来我就把它用的好的地方给记录下来。

1.HelloWorld类：

先预加载资源。

void HelloWorld::PreloadMusicAndPicture()
{
//png加入全局cache中 plist存储了
SpriteFrameCache::getInstance()->addSpriteFramesWithFile("ui/shoot_background.plist");
SpriteFrameCache::getInstance()->addSpriteFramesWithFile("ui/shoot.plist");
// 音效
CocosDenshion::SimpleAudioEngine::getInstance()->preloadBackgroundMusic("sound/background-music1.mp3");

｝

auto copyRight = Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("shoot_copyright.png"));

播放动画：

// Animation是由许多精灵帧组成，可以设置间隔时间，持续时间等，它实际上是包含着一组数据
Animation* animation=Animation::create();
animation->setDelayPerUnit(0.2f); // 间隔时间
animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_loading1.png"));
animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_loading2.png"));
animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_loading3.png"));
animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_loading4.png"));

// 通过帧数据创建帧动作（创建序列帧动画）
Animate* animate=Animate::create(animation);
Repeat* repeat=Repeat::create(animate,3); // 重复一个动作的次数
CallFuncN* repeatdone=CallFuncN::create(CC_CALLBACK_1(HelloWorld::loadingDone,this)); // 创建回调函数 CC_CALLBACK_1 代表一个参数
Sequence* sequence=Sequence::create(repeat,repeatdone,NULL);// 让多个动作按照前后顺序逐一执行 repeatdone 放在 repeat前的话，就不会播放执行3次序列帧的动画
loading->runAction(sequence); // 执行上述动画

回调：注意它这里带了个Node参数，这样可以方便的获得对象。

void HelloWorld::loadingDone( Node* pNode )
{
auto scene = GameLayer::createScene();
TransitionCrossFade *pAnimateScene = TransitionCrossFade::create(1,scene);
Director::getInstance()->replaceScene(pAnimateScene);
}

// 背景无限滚动:
auto backgroundA = Sprite::create("ui/shoot_background/background.png");
backgroundA->setTag(e_BackgroundA);
backgroundA->setAnchorPoint(Point::ZERO);
backgroundA->setPosition(Point::ZERO);
this->addChild(backgroundA);

auto backgroundB = Sprite::create("ui/shoot_background/background.png");
backgroundB->setTag(e_BackgroundB);
backgroundB->setAnchorPoint(Point::ZERO);
backgroundB->setPosition(Point::ZERO);
this->addChild(backgroundB);

// 每帧都调用的函数
this->schedule(schedule_selector(GameLayer::backgroundMove));

void GameLayer::backgroundMove(float dt)
{
Sprite *pBackgroundA = (Sprite*)this->getChildByTag(EnBackground::e_BackgroundA);
Sprite *pBackgroundB = (Sprite*)this->getChildByTag(EnBackground::e_BackgroundB);

pBackgroundA->setPositionY(pBackgroundA->getPositionY() - 2);
pBackgroundB->setPositionY(pBackgroundA->getPositionY() + pBackgroundA->getContentSize().height);
if (0 == pBackgroundB->getPositionY())
{
pBackgroundA->setPositionY(0);
}
}

4.创建精灵，并且触摸移动不出屏幕。

auto sprite = Sprite::create("ui/shoot/hero1.png");
sprite->setPosition(Point(winSize.width/2,sprite->getContentSize().height/2));
sprite->setTag(AIRPLANE);
this->addChild(sprite);

// 我机触摸
auto listener = EventListenerTouchOneByOne::create();
listener->setSwallowTouches(true);

listener->onTouchBegan = [](Touch* touch,Event *event){
auto target = static_cast<Sprite*>(event->getCurrentTarget());

Point locationInNode = target->convertToNodeSpace(touch->getLocation());
Size s = target->getContentSize();
Rect rect = Rect(0,s.width,s.height);

if (rect.containsPoint(locationInNode))
{
return true;
}
else
{
return false;
}
};

listener->onTouchMoved =[](Touch* touch,Event *event){
auto target = static_cast<Sprite*>(event->getCurrentTarget());
target->setPosition(target->getPosition() + touch->getDelta());
};
listener->onTouchEnded = [=](Touch* touch,Event* event){
};

//将触摸监听添加到eventDispacher中去
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener,sprite);

// 每帧都调用的函数
this->schedule(schedule_selector(PlaneLayer::checkBorder));

return true;
}

void PlaneLayer::checkBorder( float dt )
{
//进行边界判断,不可超出屏幕 Point location = this->getChildByTag(AIRPLANE)->getPosition(); Size winSize=Director::sharedDirector()->getWinSize(); // 获取opengl视图窗口大小 Size planeSize=this->getChildByTag(AIRPLANE)->getContentSize(); // 返回的就是这个矩形的大小,只是是逻辑尺寸,而不是像素的 if (location.x<planeSize.width/2) { location.x=planeSize.width/2; } if (location.x>winSize.width-planeSize.width/2) { location.x=winSize.width-planeSize.width/2; } if (location.y<planeSize.height/2) { location.y=planeSize.height/2; } if (location.y>winSize.height-planeSize.height/2) { location.y=winSize.height-planeSize.height/2; } this->getChildByTag(AIRPLANE)->setPosition(location); }

（编辑：李大同）

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