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我对闪光灯很陌生。我正在尝试为我的简单 Flash 应用程序（使用 adobe flex builder 3）显示一个简单的按钮。

主项目文件Client2.as：

package
{
    import flash.display.Sprite;

    [SWF(width="600", height="600", frameRate="31", backgroundColor="#00FFFF")] //set project properties

    public class Client2 extends Sprite
    {   
        public function Client2() {
            trace("Client launched.");
            var loginGui:LoginInterface = new LoginInterface(); //load the login interface object
            loginGui.init(); //initialize the login interface
        }
    }
}

然后是 LoginInterface.as 类文件：

package
{
    import flash.display.Sprite;
    import flash.display.SimpleButton;

    public class LoginInterface extends Sprite
    {
        public function LoginInterface()
        {
            trace("LoginInterface object loaded.");
        }

        public function init():void
        {
            trace("LoginInterface init method was called.");

            var myButton:SimpleButton = new SimpleButton();

            //create the look of the states
            var down:Sprite = new Sprite();
            down.graphics.lineStyle(1, 0x000000);
            down.graphics.beginFill(0xFFCC00);
            down.graphics.drawRect(10, 10, 100, 30);

            var up:Sprite = new Sprite();
            up.graphics.lineStyle(1, 0x000000);
            up.graphics.beginFill(0x0099FF);
            up.graphics.drawRect(10, 10, 100, 30);

            var over:Sprite = new Sprite();
            over.graphics.lineStyle(1, 0x000000);
            over.graphics.beginFill(0x9966FF);
            over.graphics.drawRect(10, 10, 100, 30);

            // assign the sprites
            myButton.upState = up;
            myButton.overState = over;
            myButton.downState = down;
            myButton.hitTestState = up;

            addChild(myButton);



        }
    }
}

当我运行它时，按钮没有显示。我究竟做错了什么？

4

1 回答 1

1

ActionScript3 图形基于显示列表概念。本质上，图形元素必须添加到显示列表中才能被看到。

显示列表的根节点（实际上是一棵树）是您的主类 Client2。因此，您希望在屏幕上显示的任何内容都必须添加为此元素的子元素，如下所示：

addChild(loginGui);  //inside of your main class

同样，您的按钮必须添加到您的 LoginInterface 实例中

addChild(myButton);  //inside of LoginInterface
于 2009-06-23T21:22:56.387 回答