TypeError:错误#1009:无法访问空对象引用的属性或方法| FLASH BUILD/STARLING FRMWRK

我正在使用的语言是Actionscript，我对它还是一种新手。在Flash构建中运行调试模式后（使用starling框架）出现以下错误

我将列出并显示每个类的所有代码

游戏类-

package
{
    import starling.display.Sprite;
    import starling.events.Event;
    import screens.Welcome;

    public class Game extends Sprite
    {
        private var screenWelcome:Welcome;

        public function Game()
        {
            super();
            this.addEventListener(starling.events.Event.ADDED_TO_STAGE, onAddedToStage);
        }

        private function onAddedToStage(event:Event):void
        {
            trace("starling framework initialized!");

            screenWelcome = new Welcome();
            this.addChild(screenWelcome);
            screenWelcome.initialize();
        }
    }
}

资产类别-

package
{
    import flash.utils.Dictionary;
    import starling.textures.Texture;
    import flash.display.Bitmap;

    public class Assets
    {
        [Embed(source="../media/graphics/bgWelcome.jpg")]
        public static const BgWelcome:Class;

        [Embed(source="../media/graphics/welcome_hero.png")]
        public static const WelcomeHero:Class;

        [Embed(source="../media/graphics/welcome_title.png")]
        public static const WelcomeTitle:Class;

        [Embed(source="../media/graphics/welcome_playButton.png")]
        public static const WelcomePlayBtn:Class;

        [Embed(source="../media/graphics/welcome_aboutButton.png")]
        public static const WelcomeAboutBtn:Class;

        private static var gameTextures:Dictionary =  new Dictionary()

        public static function getTexture(name:String):Texture
        {
            if (gameTextures[name] == undefined)
            {
                var bitmap:Bitmap = new Assets[name]();
                gameTextures[name] = Texture.fromBitmap(bitmap);
            }
            return gameTextures[name];
        }
    }
}

欢迎光临

package screens
{
    import starling.display.Button;
    import starling.display.Image;
    import starling.display.Sprite;
    import starling.events.Event;

    public class Welcome extends Sprite
    {
        private var bg:Image;
        private var title:Image;
        private var hero:Image;

        private var playBtn:Button;
        private var aboutBtn:Button;

        public function Welcome()
        {
            super();
            this.addEventListener(starling.events.Event.ADDED_TO_STAGE, onAddedToStage);
        }

        private function onAddedToStage(event:starling.events.Event):void

        {
            trace("welcome screen initialized!");

            drawScreen();
        }

        private function drawScreen():void
        {
            bg= new Image(Assets.getTexture("BgWelcome"));
            this.addChild(bg);

            title= new Image(Assets.getTexture("WelcomeTitle"));
            title.x = 440;
            title.y = 20;
            this.addChild(title);

            bg= new Image(Assets.getTexture("WelcomeHero"));
            this.addChild(hero);
            hero.x = -hero.width;
            hero.y = 100;

            playBtn = new Button(Assets.getTexture("WelcomePlayBtn"));
            this.addChild(playBtn);
            playBtn.x = 500;
            playBtn.y = 260;
            this.addChild(playBtn);

            aboutBtn = new Button(Assets.getTexture("WelcomeAboutBtn"));
            aboutBtn.x = 410;
            aboutBtn.y = 380;
            this.addChild(playBtn);
        }

        public function initialize():void
        {
            this.visible = true;

            hero.x = -hero.width;
            hero.y = 100;

        }
    }
}

最后但并非最不重要的是“StarlingProject.as”

package
{
    import flash.display.Sprite;
    import starling.core.Starling;  

        [SWF(frameRate="60", width="800". baxkroundColour="0x3333333")]
    public class StarlingProject extends Sprite
    {

        private var myStarling:Starling;

        public function StarlingProject()

        {
            myStarling = new Starling(Game, stage);
            myStarling.antiAliasing = 1;
            myStarling.start();

        }
    }
}

请试着给我回电话。：）

谢谢，

---

DT.

资产类别的实例没有BgWelcome、WelcomeHero等属性

这将是一个实例属性：

public const BgWelcome:Class;

public static const BgWelcome:Class;

public const BgWelcome:Class;

这是一个类属性：

public const BgWelcome:Class;

public static const BgWelcome:Class;

public const BgWelcome:Class;

static关键字使其成为类属性，而不是实例属性

当您这样做时：

new Assets[name]();

创建资产实例并尝试访问该范围中不存在的属性。如果您像这样声明变量，它将起作用：