个回答

• 我想说什么来着

  2018-02-24 12:03:59

  function drawBackground(){

  ctx2.drawImage(bgPic, 0, 0, canWidth = 800, canHeight = 600);

  }

  应该是main.js中的

  canWidth = can1.width;

  canHeight = can1.canHeight;

  没有获取到值

  0