个回答

• Sonia_Sun

  2017-05-14 09:54:09

  js代码引用要在canvas标签下面

  0

• 樱沫

  2016-09-18 11:02:15

  document.body.onload = game;

  function game(){

  //初始工作

  init();

  }

  
  

  function init(){

  //获得canvas、context

  var can1 = document.getElementById("canvas1");//在前面：fishes、UI、dust、circle

  var ctx1 = can1.getContext();

  var can2 = document.getElementById("canvas2");//background、ane、fruits

  var ctx2 = can2.getContext();

  }

  
  

  function gameloop(){

  requestAnimFrame(gameloop);

  }

  
  

  0