【Cocos2d-x】音量滑动设定以及自动保存功能实现（完整模块）

【囧希博客个人原创文章，欢迎讨论交友，如转载请注明出处：http://blog.csdn.net/yunpro】

【本段代码可以单独使用在一个场景中，作为一个独立完整的功能模块使用！】

该段代码可以实现滑动改变音量以及自动保存的功能，

可以在单独设定的页面中对音量，以及音效进行单独分别的设定。

图片使用的附件是cocos引擎text例子内的代码。

【效果图】

【实例代码】

<span style="font-size:14px;">#include "ui/CocosGUI.h"USING_NS_CC;using namespace ui;Scene* AudioControl::createScene(){    auto scene =Scene::create();    auto layer =AudioControl::create();    scene->addChild(layer);    return scene;}bool AudioControl::init(){    if(!Layer::init()){        return false;    }        //获得设备尺寸    Size visibleSize = Director::getInstance()->getVisibleSize();        //BGM条    //创建背景音乐文本，并添加为当前层的子节点    auto music_text = Text::create("音乐音量","Arial",32);    music_text->setPosition(Vec2(visibleSize.width*0.25, visibleSize.height*0.7));    this->addChild(music_text);    //创建一个滑动进度条    auto music_slider=Slider::create();    music_slider->loadBarTexture("sliderTrack.png");    music_slider->loadSlidBallTextures("sliderThumb.png", "sliderThumb.png", "");    music_slider->loadProgressBarTexture("sliderProgress.png");    //获取之前设置的音乐音量    float musicPercent = UserDefault::getInstance()->getFloatForKey("musicPercent");    //    //第一次默认100//    if(musicPercent == 0.0f){//        musicPercent = 100.0f;//    }        //设置背景初始值    music_slider->setPercent(musicPercent);    music_slider->cocos2d::Node::setPosition(Vec2(visibleSize.width*0.6, visibleSize.height*0.7));    //添加监听器    music_slider->addEventListener([=](Ref* pSender,Slider::EventType type){        //当滑块的百分比发生变化的时候        if(type== Slider::EventType::ON_PERCENTAGE_CHANGED){            //获得滑动条的百分比            int percent = music_slider->getPercent();            SimpleAudioEngine::getInstance()->setBackgroundMusicVolume(float(percent)/100);            UserDefault::getInstance()->setFloatForKey("musicPercent", percent);        }    });    this->addChild(music_slider);        //EF条    //文    auto sound_text =Text::create("音效音量", "Arial", 32);    sound_text->setPosition(Vec2(visibleSize.width*0.25,visibleSize.height*0.5));    this->addChild(sound_text);        //条    auto effects_slider =Slider::create();    effects_slider->loadBarTexture("sliderTrack.png");//条材质    effects_slider->loadSlidBallTextures("sliderThumb.png", "sliderThumb.png", "");    effects_slider->loadProgressBarTexture("sliderProgress.png");        float effectPercent = UserDefault::getInstance()->getFloatForKey("effectPercent");//获取之前设定EF值    //    if (effectPercent == 0.0f) {//初次进入100//        effectPercent = 100.0f;//    }        effects_slider->setPercent(effectPercent);//设定初始值    effects_slider->cocos2d::Node::setPosition(Vec2(visibleSize.width*0.6,visibleSize.height*0.5));    effects_slider->addEventListener([=](Ref* pSender,Slider::EventType type){//获取，改变        if(type== Slider::EventType::ON_PERCENTAGE_CHANGED){        int percent = effects_slider->getPercent();        SimpleAudioEngine::getInstance()->setEffectsVolume(float(percent)/100);        UserDefault::getInstance()->setFloatForKey("effectPercent", percent);        }    });    this->addChild(effects_slider);        //返回    auto return_button = Button::create("b1.png");    return_button->setPosition(Vec2(visibleSize.width/2,visibleSize.width/2-300));    return_button->getContentSize().width/2;    return_button->getContentSize().height/2;        return_button->addTouchEventListener([](Ref* pSender,Widget::TouchEventType type){            if (type == Widget::TouchEventType::ENDED) {        auto transition = TransitionSlideInL::create(0.3,GameMenu::createScene());        Director::getInstance()->replaceScene(transition);        }    });    this->addChild(return_button);        //版权    auto banner_text = Text::create("『帮助』自动保存设置声量大小","Arial-BoldMT",32);    banner_text->setPosition(Vec2(visibleSize.width/2, visibleSize.height*0.15));    this->addChild(banner_text);        //网址    auto email_text = Text::create("[e-mail]", "Arial-BoldMT", 32);    email_text->setPosition(Vec2(visibleSize.width/2,visibleSize.height*0.1));    this->addChild(email_text);        return true;}</span>

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