(二) 我方飛機的實現 · cocos2d-x游戲實戰-決戰南海

? ? ? ? 在上一篇中，我們實現了游戲的開始界面，接下來要實現游戲的主界面，主界面包含地圖、我方飛機、敵機等 ? ? ? ? 先來實現我方飛機我方飛機具有哪些屬性呢？飛機要具有生命值、要有動畫效果(尾部噴氣),飛機不能夠飛出邊界，所以要進行邊界檢測，當飛機生命值為0時，飛機會爆炸，然后被移除。 .h文件 ~~~ //飛機動畫 Animate* planeFly(); //邊界檢測 void borderCheck(float dt); //飛機爆炸 void blowUp(); //移除飛機 void removePlane(); //獲取生命值 int getAlive(); //設定生命值 void loseAlive(); // 更新生命值 void updateAlive(int alive); ~~~ 這個變量在create()函數中初始化，方便其他層調用我方飛機的相關數據 ~~~ static MyPlane* instancePlane; //飛機實例 ~~~ 我方飛機的生命值直接在這里顯示、更新，不受控制器的控制 ~~~ private: int m_alive; Label* aliveItem1; Label* aliveItem2; ~~~ .cpp文件 ~~~ /* ************************************************************************ * * MyPlane.cpp * 杜星飛 2015年8月13日 * 描述: 包含飛機的屬性、功能等 * ************************************************************************ */ #include "MyPlane.h" #include "SimpleAudioEngine.h" MyPlane::MyPlane() :m_alive(5) { } MyPlane::~MyPlane() { } MyPlane* MyPlane::instancePlane = NULL; MyPlane* MyPlane::create() { MyPlane* m_plane = NULL; do { m_plane = new MyPlane(); CC_BREAK_IF(!m_plane); if (m_plane && m_plane->init()) { m_plane->autorelease(); instancePlane = m_plane; } else CC_SAFE_DELETE(m_plane); } while (0); return m_plane; } //飛機動畫 Animate* MyPlane::planeFly() { Vector<SpriteFrame *> vector; for (int i = 0; i < 2; i++) { auto frameName = __String::createWithFormat("chinaFly%d.png", i + 1); auto temSpriteFrame = SpriteFrameCache::getInstance()->getSpriteFrameByName(frameName->getCString()); vector.pushBack(temSpriteFrame); } //設置不斷播放飛機的動畫 auto animation = Animation::createWithSpriteFrames(vector, 0.2f, -1); auto animate = Animate::create(animation); return animate; } bool MyPlane::init() { if(!Layer::init()) return false; Size winSize = Director::getInstance()->getWinSize(); //添加飛機 auto m_planeSprite = Sprite::createWithSpriteFrameName("chinaFly1.png"); m_planeSprite->setPosition(Point(winSize.width / 2, m_planeSprite->getContentSize().height / 2)); m_planeSprite->setTag(AIRPLANE); this->addChild(m_planeSprite); m_planeSprite->runAction(this->planeFly()); // 飛機觸摸 auto listener = EventListenerTouchOneByOne::create(); listener->setSwallowTouches(true); //吞噬觸摸事件 //對觸摸事件的監聽過程直接寫在這里 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, 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) { }; //將觸摸監聽添加到eventDispacher中去 _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, m_planeSprite); //初始化生命值 //設置標簽并獲取中文文本 auto dictionary = Dictionary::createWithContentsOfFile("fonts/AboutMe.xml"); aliveItem1 = Label::createWithTTF( (((__String*)(dictionary->objectForKey("alive"))))->getCString(), "fonts/DFPShaoNvW5-GB.ttf", 25); aliveItem1->setPosition(Point(winSize.width/8, winSize.height-aliveItem1->getContentSize().height)); aliveItem1->setColor(Color3B(255, 0, 0)); this->addChild(aliveItem1); aliveItem2 = Label::createWithTTF( "5", "fonts/DFPShaoNvW5-GB.ttf", 25); aliveItem2->setPosition(Point(aliveItem1->getPositionX()*2, winSize.height - aliveItem1->getContentSize().height)); aliveItem2->setColor(Color3B(255, 0, 0)); this->addChild(aliveItem2); // 開啟邊界檢測 this->schedule(schedule_selector(MyPlane::borderCheck)); return true; } //邊界檢測 void MyPlane::borderCheck(float dt) { //進行邊界判斷,不可超出屏幕 Point location = this->getChildByTag(AIRPLANE)->getPosition(); Size winSize = Director::getInstance()->getWinSize(); // 返回的就是這個矩形的大小 Size planeSize = this->getChildByTag(AIRPLANE)->getContentSize(); 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); } //飛機爆炸 void MyPlane::blowUp() { this->unscheduleAllSelectors(); // 停止飛機的所有行動 //加載飛機爆炸動畫音效 if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/chinaDown.mp3"); } Vector<SpriteFrame*> planeBlowUp; for (int i = 0; i < 4; i++) { auto planeName = __String::createWithFormat("china1_down%d.png", i + 1); auto tempBlowUp = SpriteFrameCache::getInstance()->getSpriteFrameByName( planeName->getCString()); planeBlowUp.pushBack(tempBlowUp); } Animation* animation = Animation::createWithSpriteFrames(planeBlowUp, 0.2f); Animate* animate = Animate::create(animation); CallFunc* m_removePlane = CallFunc::create(this, callfunc_selector(MyPlane::removePlane)); Sequence* sequence = Sequence::create(animate, m_removePlane, NULL); // 停止一切的飛機動作 this->getChildByTag(AIRPLANE)->stopAllActions(); this->getChildByTag(AIRPLANE)->runAction(sequence); } //移除飛機 void MyPlane::removePlane() { // 移除飛機精靈 true子節點上的所有運行行為和回調將清理 this->removeChildByTag(AIRPLANE, true); } //獲取生命值 int MyPlane::getAlive() { return m_alive; } //設定生命值 void MyPlane::loseAlive() { --m_alive; updateAlive(m_alive); } // 更新生命值 void MyPlane::updateAlive(int alive) { if (alive >= 0) { CCString* strAlive = CCString::createWithFormat("%d", alive); aliveItem2->setString(strAlive->getCString()); aliveItem2->setColor(Color3B(rand_0_1() * 255, rand_0_1() * 255, rand_0_1() * 255)); } } ~~~ 更新生命值的函數只用在我方飛機生命值減少是調用。還有就是對于中文字符的處理 ~~~ //設置標簽并獲取中文文本 auto dictionary = Dictionary::createWithContentsOfFile("fonts/AboutMe.xml"); ~~~ 可以在項目中添加一個XML文件 ~~~ <?xml version="1.0" encoding="UTF-8"?> <dict> <key>play</key> <string>開始游戲</string> <key>score</key> <string>得分:</string> <key>alive</key> <string>生命:</string> ~~~ 通過相應的key來顯示顯示相應的中文。還有就是，有些字體不支持中文的顯示，比如系統自帶的?arial.ttf就不行，而DFPShaoNvW5-GB.ttf可以。