cocos2d-x CCControlPotentiometer 圆形音量按钮

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  1. #include "cocos-ext.h"
  1. USING_NS_CC_EXT;
  2.  
  3. CCScene * circleButton::scene()
  4. {
  5. CCScene * s = CCScene::create();
  6. CCLayer * layer = circleButton::create();
  7. s->addChild(layer);
  8. return s;
  9. }
  10. bool circleButton::init()
  11. {
  12. bool bRet = false;
  13. do
  14. {
  15. CC_BREAK_IF(!CCLayer::init());
  16.  
  17. //圆形按钮;
  18. CCControlPotentiometer * potentiometer = CCControlPotentiometer::create("poleBg.png",//底座:
  19. "bgup.png",//进度条;
  20. "pole.png");//中心按钮;
  21. potentiometer->setPosition(ccp(200,200));
  22. addChild(potentiometer);
  23. //添加监听事件:监听事件不加也可以,如果想要迷彩灯效果的话,也可以用定时器来完成:schedule();
  24. potentiometer->addTargetWithActionForControlEvents(
  25. this,//添加onvalueChanged用来监听音量控制按钮的数值变化;音量值的范围是0-1;
  26. cccontrol_selector(circleButton::onValueChanged),CCControlEventValueChanged);//音量改变;
  27.  
  28. bRet = true;
  29. } while (0);
  30.  
  31. return bRet;
  32. }
  33. //回调函数
  34. void circleButton::onValueChanged(CCObject*pSender,CCControlEvent event)
  35. {
  36. //通过pSender参数获取按钮;
  37. CCControlPotentiometer* potentiometer = (CCControlPotentiometer *)pSender;
  38. CCString * valueStr = CCString::createWithFormat("%f",potentiometer->getValue());//转为数值输出;
  39. CCLog(valueStr->getCString());
  40. }

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