5.cocos2dx中关于draw绘图，声音和音效，预加载，播放与停止Vs暂停和恢复，音量控制

头文件

T19Draw.h

#ifndef __T19Draw_H__

#define __T19Draw_H__

#include "cocos2d.h"

#include "TBack.h"

USING_NS_CC;

class T19Draw:public TBack

{

public:

    static CCScene * scene();

    CREATE_FUNC(T19Draw);

    bool init();

    void draw();

};

#endif

T19Draw.cpp

#include "T19Draw.h"

#include "AppMacros.h"

CCScene *T19Draw::scene()

{

    CCScene * scene = CCScene::create();

    T19Draw * layer = T19Draw::create();

    scene->addChild(layer);

    return scene;

}

bool T19Draw::init()

{

    TBack::init();

    return true;

}

void T19Draw::draw()

{

    //设置点的尺寸大小

    ccPointSize(10);

    //设置颜色

    ccDrawColor4B(255,0,0,0);

    //做一个点，ccp(100,100)中的值是点的坐标位置

    ccDrawPoint(ccp(100,100));

    //定义一个点的集合

    CCPoint p[] = {ccp(100,200),ccp(100,300),ccp(200,100)};

    //开始画点，第二个参数表示点的个数

    ccDrawPoints(p, 3);

    //画一条线段

    ccDrawColor4B(0, 255, 0, 0);

    glLineWidth(5);

    ccDrawLine(ccp(100,300),ccp(200,100));

    //画一个矩形,由对角线的两个点最终生成两个矩形

    ccDrawRect(ccp(100,100),ccp(400,300));

    ccDrawColor4B(0, 0, 255, 0);

    CCPoint poly[] = { ccp(150, 100), ccp(200, 150), ccp(300, 10) };

    //以上面的三个点画出一个矩形，最后一个false来控制形状是否合并

    //第二个参数表示的是点的个数

    ccDrawPoly(poly, 3, true);

    //这里表示话一个圆

    ccDrawCircle(ccp(240,160),60,3.14,100,true);

}

运行结果：

#include "SimpleAudioEngine.h"

using namespace CocosDenshion;

平台

支持的常见文件格式

备注

Android

mp3,mid,oggg,wav

可以播放android,media,MediaPlayer所支持的所有格式

ios

acc,caf,mp3,wav

可以播放AVAudioPlayer所支持的所有格式

Windows

mid,mp3,wav

无

平台

支持的常见文件格式

备注

Android

aggg,wav

对wav的支持不完美

Ios

caf,m4a

可以播放Cocos2d-iphone,CocosDesion所支持的所有格式

windows

mid,wav

无

SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic("audio/start.wav");

SimpleAudioEngine::sharedEngine()->preloadEffect(“audio/onclick.wav”);

SimpleAudioEngine::sharedEngine()->playBackgroundMusic(“audio/start.wav”);

bool T19Music::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent) {

SimpleAudioEngine::sharedEngine()->playEffect("audio/onclick.wav");

static bool flag = true;

if (flag) {

SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

//SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();

    } else {

SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

//SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

    }

flag = !flag;

return true;

}

//设置音量大小

SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);

//获得音量的大小

SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume();

void AppDelegate::applicationDidEnterBackground() {

CCDirector::sharedDirector()->stopAnimation();

// if you use SimpleAudioEngine, it must be pause

// SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

}

// this function will be called when the app is active again

void AppDelegate::applicationWillEnterForeground() {

CCDirector::sharedDirector()->startAnimation();

// if you use SimpleAudioEngine, it must resume here

// SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

}

T20Music.h

#ifndef __T20Music_H__

#define __T20Music_H__

#include "cocos2d.h"

#include "TBack.h"

USING_NS_CC;

class T20Music :public TBack

{

public:

    static CCScene * scene();

    CREATE_FUNC(T20Music);

    bool init();

    virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);

};

#endif

T20Music.cpp

#include "T20Music.h"

#include "AppMacros.h"

#include "SimpleAudioEngine.h"

using namespace CocosDenshion;

CCScene *T20Music::scene()

{

    CCScene *scene = CCScene::create();

    T20Music * layer = T20Music::create();

    scene->addChild(layer);

    return scene;

}

bool T20Music::init()

{

    TBack::init();

    //预加载音乐

    SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic("audio/start.wav");

    SimpleAudioEngine::sharedEngine()->preloadEffect("audio/onclick.wav");

    SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

    //设置触摸可以行

    setTouchEnabled(true);

    setTouchMode(kCCTouchesOneByOne);

    return true;

}

//通过鼠标事件控制声音的显示和消失

bool T20Music::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)

{

    static bool flag = true;

    SimpleAudioEngine::sharedEngine()->playEffect("audio/onclick.wav");

    if (flag)

    {

        //SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

        //暂停播放音乐

        SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

    }

    else

    {

        //SimpleAudioEngine::sharedEngine()->stopBackgroundMusic("audio/start.wav");

        //重新恢复播放音乐

        SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

    }

    flag = !flag;

    //控制音量

    SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);

    SimpleAudioEngine::sharedEngine()->stopAllEffects();

    SimpleAudioEngine::sharedEngine()->unloadEffect("audio/start.wav");

    return false;

}

运行效果是：当进入这个scene之后就会听见音乐，当鼠标点击的时候声音停止了。