1 很多游戏有关闭游戏背景音乐的功能。我参考了郑州boy的博客，增加在simpleGame里面
在HelloWorldScene.h里面添加回调的声明。
1 void vedioOnAndOffCallBack(CCObject* pSend);
在HelloWorldScene.cpp的 HelloWorld::init()添加下面的代码
1 CocosDenshion::SimpleAudioEngine::sharedEngine()->playBackgroundMusic("background-music-aac.wav", true); 2 //CCMenuItemSprite * CCMenuItemSprite::create(CCNode* normalSprite, CCNode* selectedSprite, CCNode* disabledSprite) 3 //根据定义已经很明显了，就不解释了 4 CCMenuItemSprite *pitemVoff=CCMenuItemSprite::create(CCSprite::create("gmme/button_sound_off.png"),CCSprite::create("gmme/button_sound_off.png")); 5 CC_BREAK_IF(!pitemVoff); 6 7 CCMenuItemSprite *pitemVon=CCMenuItemSprite::create(CCSprite::create("gmme/button_sound_on.png"),CCSprite::create("gmme/button_sound_on.png")); 8 CC_BREAK_IF(!pitemVon); 9 10 CCMenuItemToggle * pVedioTo = NULL; 11 // 当现在 音乐是 播放的时候界面上显示的按钮应该是 暂停音乐按钮 反之 则显示播放按钮 12 if(CCUserDefault::sharedUserDefault()->getBoolForKey("isplay",false)){ 13 pVedioTo=CCMenuItemToggle::createWithTarget(this,menu_selector(HelloWorld::vedioOnAndOffCallBack),pitemVoff,pitemVon,NULL); 14 }else { 15 pVedioTo=CCMenuItemToggle::createWithTarget(this,menu_selector(HelloWorld::vedioOnAndOffCallBack),pitemVon,pitemVoff,NULL); 16 } 17 18 19 CC_BREAK_IF(!pVedioTo); 20 //我随便设置的位置 21 pVedioTo->setPosition(30,50); 22 23 CCMenu* pMenu1=CCMenu::create(pVedioTo,NULL); 24 CC_BREAK_IF(!pMenu1); 25 pMenu1->setPosition(CCPointZero); 26 this->addChild(pMenu1,2);
里面主要创建了CCMenuItemSprite 感觉和android的imageButton类似。
创建了CCMenuItemToggle，和获取音乐状态。
在HelloWorldScene.cpp添加回调函数
1 void HelloWorld::vedioOnAndOffCallBack(CCObject* pSend){ 2 if(CCUserDefault::sharedUserDefault()->getBoolForKey("isplay",false)){ 3 CocosDenshion::SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic(); 4 CCLOG("music is stop"); 5 CCUserDefault::sharedUserDefault()->setBoolForKey("isplay",false); 6 }else { 7 CocosDenshion::SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic(); 8 CCUserDefault::sharedUserDefault()->setBoolForKey("isplay",true); 9 CCLOG("music is play"); 10 } 11 12 }
2 炮台旋转
我们在HelloWorldScene.h里面添加
1 cocos2d::CCSprite * player; 2 cocos2d::CCSprite * nextProjectile; 3 void finishShoot();
在HelloWorldScene.cpp里面实现finishShoot方法。
1 void HelloWorld::finishShoot(){ 2 // Ok to add now - we've finished rotation! 3 this->addChild(nextProjectile); 4 _projectiles->addObject(nextProjectile); 5 6 // Release 7 nextProjectile->release(); 8 nextProjectile = NULL; 9 }
修改
1 void HelloWorld::ccTouchesEnded(CCSet* touches, CCEvent* event) 2 3 { 4 //if(nextProjectile !=NULL) {return;} 5 // Choose one of the touches to work with 6 CCTouch* touch = (CCTouch*)( touches->anyObject() ); 7 CCPoint location = touch->getLocation(); 8 9 CCLog("++++++++after x:%f, y:%f", location.x, location.y); 10 11 // Set up initial location of projectile 12 CCSize winSize = CCDirector::sharedDirector()->getVisibleSize(); 13 CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin(); 14 //CCSprite *projectile = CCSprite::create("Projectile.png", CCRectMake(0, 0, 20, 20)); 15 nextProjectile = CCSprite::create("Projectile2.png"); 16 nextProjectile->retain(); 17 nextProjectile->setPosition( ccp(origin.x+20, origin.y+winSize.height/2) ); 18 19 // Determinie offset of location to projectile 20 float offX = location.x - nextProjectile->getPosition().x; 21 float offY = location.y - nextProjectile->getPosition().y; 22 23 // Bail out if we are shooting down or backwards 24 if (offX <= 0) {return;} 25 CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect("pew-pew-lei.wav"); 26 // Ok to add now - we've double checked position 27 //this->addChild(nextProjectile); 28 29 // Determine where we wish to shoot the projectile to 30 float realX = origin.x+winSize.width + (nextProjectile->getContentSize().width/2); 31 float ratio = offY / offX; 32 float realY = (realX * ratio) + nextProjectile->getPosition().y; 33 CCPoint realDest = ccp(realX, realY); 34 35 // Determine the length of how far we're shooting 36 float offRealX = realX - nextProjectile->getPosition().x; 37 float offRealY = realY - nextProjectile->getPosition().y; 38 float length = sqrtf((offRealX * offRealX) + (offRealY*offRealY)); 39 float velocity = 480/1; // 480pixels/1sec 40 float realMoveDuration = length/velocity; 41 //弧度 2π弧度=360角度 42 float angleRadians =(float)std::atan(offRealY / offRealX); 43 //float angleDegrees = (float)(angleRadians*(180/PI)) 44 float angleDegrees = CC_RADIANS_TO_DEGREES(angleRadians); 45 float cocosAngle = -1 * angleDegrees; 46 //add 47 float rotateSpeed=0.5/M_PI;//Would take 0.5 seconds to rotate 0.5 radians, or half a circle 48 float rotateDuration = fabs(angleRadians * rotateSpeed); 49 50 51 52 //player->setRotation (cocosAngle); 53 54 player->runAction( 55 CCSequence::create(CCRotateTo::create(rotateDuration,cocosAngle), 56 CCCallFunc::create(this,callfunc_selector(HelloWorld::finishShoot)), 57 NULL 58 )); 59 60 // Move projectile to actual endpoint 61 nextProjectile->runAction( CCSequence::create( 62 CCMoveTo::create(realMoveDuration, realDest), 63 CCCallFuncN::create(this, 64 callfuncN_selector(HelloWorld::spriteMoveFinished)), 65 NULL) ); 66 67 // Add to projectiles array 68 nextProjectile->setTag(2); 69 //_projectiles->addObject(projectile); 70 71 72 }
关于这个if(nextProjectile !=NULL) {return;}地方真是让人疑惑啊。