个回答

• wyt1996

  2017-12-08 14:33:37

  已采纳

  void HelloWorld::setBackGround(const char *filename){

      if(backImg == 0){

          backImg=Sprite::create(filename);

          backImg->setAnchorPoint(Point::ZERO);

          backImg->setPosition(Point::ZERO);

          Size mywinsize=Director::getInstance()->getWinSize();

          float winw = mywinsize.width;

          float winh = mywinsize.height;

          float spx = backImg->getTextureRect().getMaxX();

          float spy = backImg->getTextureRect().getMaxY();

          backImg->setScaleX(winw/spx);

          backImg->setScaleY(winh/spy);

          this->addChild(backImg);

          

          return;

      }

      backImg->setTexture(filename);

  }

  
  

  0

• qq_岛是海心上的疤_4

  2018-12-23 23:21:18

  非常感谢

  0