(七) 控制器的實現 · cocos2d-x游戲實戰-決戰南海

控制器中的功能并不多，主要是下面這些 ~~~ //對玩家分數的操作 CC_SYNTHESIZE_READONLY(SaveData *, m_saveData, SaveData); void update(float tm); //游戲暫停與恢復 void menuPauseCallback(cocos2d::Ref* pSender); //聲音控制 void menuMusicCallback(cocos2d::Ref* pSender); ~~~ 下面是這些功能的實現 ~~~ bool Controller::init() { if (!Layer::init()) { return false; } bool bRect = false; do { Size winSize = Director::getInstance()->getWinSize(); //從xml文件中讀取中文顯示出來 auto dictionary = Dictionary::createWithContentsOfFile("fonts/AboutMe.xml"); score_label = Label::createWithTTF( ((__String *)(dictionary->objectForKey("score")))->getCString(), "fonts/DFPShaoNvW5-GB.ttf", 25); score_label->setPosition(score_label->getContentSize().width / 2, winSize.height - score_label->getContentSize().height * 2); CC_BREAK_IF(!score_label); this->addChild(score_label); //添加顯示分數的標簽 m_saveData = SaveData::create(); //這里一定要retain一下saveData，在析構函數中release一下 m_saveData->retain(); auto str = __String::createWithFormat("%d", m_saveData->getScore()); m_score = Label::createWithTTF(str->getCString(), "fonts/DFPShaoNvW5-GB.ttf", 25); m_score->setPosition(Point(score_label->getContentSize().width + m_score->getContentSize().width / 2 + 30, winSize.height - score_label->getContentSize().height * 2)); CC_BREAK_IF(!m_score); this->addChild(m_score); //記得更新分數的顯示 this->scheduleUpdate(); //游戲聲音控制按鈕 Sprite *normalMusic = Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_musicPause.png")); Sprite *pressedMusic = Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_musicPause.png")); pMusicItem = MenuItemSprite::create( normalMusic, normalMusic, NULL, CC_CALLBACK_1(Controller::menuMusicCallback, this)); //游戲暫停按鈕 Sprite *normalPause = Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_resume_nor.png")); Sprite *pressedPause = Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_resume_pressed.png")); pPauseItem = MenuItemSprite::create( normalPause, pressedPause, NULL, CC_CALLBACK_1(Controller::menuPauseCallback, this)); Menu *menuPause = Menu::create(pMusicItem,pPauseItem, NULL); menuPause->alignItemsHorizontallyWithPadding(pPauseItem->getContentSize().width/2); menuPause->setPosition( Point(winSize.width - pPauseItem->getContentSize().width*2, winSize.height - normalPause->getContentSize().height)); this->addChild(menuPause); } while (0); return true; } //游戲暫停 void Controller::menuPauseCallback(cocos2d::Ref* pSender) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/button.mp3"); if (!Director::getInstance()->isPaused()) { // 圖標狀態設置 pPauseItem->setNormalImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_pause_nor.png"))); pPauseItem->setSelectedImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_pause_press.png"))); CocosDenshion::SimpleAudioEngine::getInstance()->pauseBackgroundMusic(); // 停止背景音樂 CocosDenshion::SimpleAudioEngine::getInstance()->stopAllEffects(); // 停止所有的特效 Director::getInstance()->pause(); // 停止所有的動作，敵機飛行，子彈前進等 } else { pPauseItem->setNormalImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_resume_nor.png"))); pPauseItem->setSelectedImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_resume_pressed.png"))); CocosDenshion::SimpleAudioEngine::getInstance()->resumeBackgroundMusic();// 恢復 Director::getInstance()->resume(); // 恢復 } } void Controller::menuMusicCallback(cocos2d::Ref* pSender) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/button.mp3"); if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { // 圖標狀態設置 pMusicItem->setNormalImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_music.png"))); pMusicItem->setSelectedImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_music.png"))); CocosDenshion::SimpleAudioEngine::getInstance()->stopBackgroundMusic(); // 停止背景音樂 // CocosDenshion::SimpleAudioEngine::getInstance()->stopAllEffects(); // 停止所有的特效 } else { pMusicItem->setNormalImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_musicPause.png"))); pMusicItem->setSelectedImage(Sprite::createWithSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName("game_musicPause.png"))); CocosDenshion::SimpleAudioEngine::getInstance()->playBackgroundMusic("sound/BackgroundMusic.mp3", true);// 恢復 // CocosDenshion::SimpleAudioEngine::getInstance()->resumeAllEffects(); } } void Controller::update(float tm) { auto str = __String::createWithFormat("%d", m_saveData->getScore()); //更新分數和坐標 m_score->setColor(Color3B(255, 0, 0)); m_score->setString(str->getCString()); m_score->setPositionX(score_label->getContentSize().width + m_score->getContentSize().width / 2 + 30); } ~~~ 要實現游戲的暫停功能，可以直接將當前運行的場景暫停，而要實現聲音的暫停，通過簡單的停止背景音樂、音效卻不行。因為不斷有新的子彈在發射、新的敵機在爆炸等。所以，我使用的方法是將背景音樂與其他音效綁定。比如下面子彈類中的代碼 ~~~ if (CocosDenshion::SimpleAudioEngine::getInstance()->isBackgroundMusicPlaying()) { CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("sound/bullet.wav"); } ~~~ 只有背景音樂處于播放狀態，音效才會播放。雖然功能實現了，不過總感覺方法太水了。。。誰有更好的方式歡迎告知。