Cocos2D游戏之旅（三）：卡牌翻转效果2（只有当鼠标点中卡牌才翻转）

#include "HelloWorldScene.h" USING_NS_CC; Scene* HelloWorld::createScene() { // 'scene' is an autorelease object auto scene = Scene::create(); // 'layer' is an autorelease object auto layer = HelloWorld::create(); // add layer as a child to scene scene->addChild(layer); // return the scene return scene; } // on "init" you need to initialize your instance bool HelloWorld::init() { if (!Layer::init()) { return false; } Size visibleSize = Director::getInstance()->getVisibleSize(); //添加背景 CCSprite* bk = CCSprite::create("bk.png"); bk->setPosition(Point(visibleSize.width / 2, visibleSize.height / 2)); this->addChild(bk); //cardFlag为偶数时，表示牌翻开，否则盖上 cardFlag = 0; /* 创建第一个精灵 */ sprite1 = Sprite::create("card.jpg"); sprite1->setPosition(Point(visibleSize.width / 2, visibleSize.height / 2)); this->addChild(sprite1); /* 创建第二个精灵 */ sprite2 = Sprite::create("bkCard.png"); sprite2->setPosition(Point(visibleSize.width / 2, visibleSize.height / 2)); this->addChild(sprite2); /* 第二个精灵默认x拉伸至0.0，于是第二个精灵在一开始是看不见的*/ sprite2->setScaleX(0.0f); //触摸事件 EventListenerTouchOneByOne* event = EventListenerTouchOneByOne::create(); event->onTouchBegan = [](Touch* touch, Event* event){ auto target = static_cast<Sprite*>(event->getCurrentTarget()); Point point = Director::getInstance()->convertToGL(touch->getLocationInView()); if (target->getBoundingBox().containsPoint(point)) { return true; } else { return false; } }; event->onTouchEnded = [=](Touch* touch, Event* event){ /* cardFlag为偶数则盖住卡牌，基数则打开卡牌 */ if (0 == cardFlag % 2) { closeCard(); } else { openCard(); } cardFlag++; }; _eventDispatcher->addEventListenerWithSceneGraphPriority(event, sprite1); _eventDispatcher->addEventListenerWithSceneGraphPriority(event->clone(), sprite2); return true; } void HelloWorld::closeCard() { /* x方向拉伸至0的动作 */ ScaleTo* scaleToHide = ScaleTo::create(0.6f, 0.0f, 1.0f); /* 创建卡牌放大的回调函数 */ auto funcScaleToShow = [=](){ ScaleTo* scaleToShow = ScaleTo::create(0.6f, 1.0f, 1.0f); sprite2->runAction(scaleToShow); }; /* 将回调函数封装为动作 */ CallFunc* callFuncSpr2 = CallFunc::create(funcScaleToShow); /* 依次执行动作 */ Sequence* sequence = Sequence::create(scaleToHide, callFuncSpr2, NULL); sprite1->runAction(sequence); } void HelloWorld::openCard() { /* x方向拉伸至0的动作 */ ScaleTo* scaleToHide = ScaleTo::create(0.6f, 0.0f, 1.0f); auto funcScaleToShow = [=](){ ScaleTo* scaleToShow = ScaleTo::create(0.6f, 1.0f, 1.0f); sprite1->runAction(scaleToShow); }; CallFunc* callFuncSpr1 = CallFunc::create(funcScaleToShow); Sequence* sequence = Sequence::create(scaleToHide, callFuncSpr1, NULL); sprite2->runAction(sequence); }