Easeljs游戏项目

Question

我正在开展一个游戏项目，但我遇到了一个问题，我收到了这个错误：

NS_ERROR_NOT_AVAILABLE:

ctx.drawImage(this.image, 0, 0); //Bitmap.js in Easeljs lib.

我在下一个代码中使用了位图。请告诉我这是否存在问题以及如何解决问题。 感谢您的合作。

代码1 ：

p.initialize = function(x,y ,stage, world){
    var bmp = new Bitmap('../assets/blackBall.png'); 
    //console.log(bmp)
    //alert(bmp)
    bmp.regX = radius;
    bmp.regY = radius;
    bmp.x=x;
    bmp.y=y;
    this.skin = bmp;

    stage.addChild(bmp);

    var fixDef = new b2FixtureDef();
    fixDef.density = 1.0;
    fixDef.friction = 0.5;
    fixDef.restitution = 0.8;
    fixDef.shape = new b2CircleShape(38*CONST.pixelToMeter);

    var bodyDef = new b2BodyDef();

    bodyDef.type = b2Body.b2_dynamicBody;
    bodyDef.position.x = bmp.x*CONST.pixelToMeter; 
    bodyDef.position.y = bmp.y*CONST.pixelToMeter;

    this.body = world.CreateBody(bodyDef);
    this.body.CreateFixture(fixDef);
    this.skin.body = this.body;
    setUserData(this.body);
    /*Event handler*/
    this.skin.onMouseOver = handleMouseOver;
    this.skin.onMouseOut = handleMouseOut;
    this.skin.onPress = handleMouseDown;
    //console.log(this.skin);
}

代码2 ：

p.initialize = function(stage, world){
    var shooterSkin = new Container();
    var cirlceSkin = new createjs.Bitmap('../assets/shooter.png');
    cirlceSkin.name = "ball";
    var arrowSkin  = new createjs.Bitmap('../assets/arrow.png');
    arrowSkin.name = "arrow";
    arrowSkin.rotation = 0;
    arrowSkin.scaleX =0;
    arrowSkin.regY = arrowHeight;
    cirlceSkin.regX = skinRadius;
    cirlceSkin.regY = skinRadius;
    cirlceSkin.x =0;
    cirlceSkin.y = 0;
    cirlceSkin.alpha=circleAlpha;
    shooterSkin.x=110
    shooterSkin.y = 110;
    shooterSkin.addChild(cirlceSkin);
    shooterSkin.addChild(arrowSkin); 
    arrowIndex = 1;

    this.skin = shooterSkin;
    stage.addChild(shooterSkin);

    var fixDef = new b2FixtureDef();
    fixDef.friction = 0;
    fixDef.restitution = 0;
    fixDef.isSensor = true;
    fixDef.shape = new b2CircleShape(radius*CONST.pixelToMeter);

    var bodyDef = new b2BodyDef();
    bodyDef.type = b2Body.b2_kineticBody;
    bodyDef.position.x = shooterSkin.x*CONST.pixelToMeter; 
    bodyDef.position.y = shooterSkin.y*CONST.pixelToMeter;
    this.body = world.CreateBody(bodyDef);
    this.body.CreateFixture(fixDef);
    setUserData(this.body);