AS3：无法从包中访问方法goToAndStop

Question

在我的主FLA文件库中，我有一个名为ProgressBar的movieclip，AS链接也被定义为ProgressBar。

然后我创建了ProgressBar.as文件。见下文。当我使用这个类时，我收到错误ProgressBar.as, Line 17 1061: Call to a possibly undefined method goToAndStop through a reference with static type ProgressBar.

USAGE：

var PBar:ProgressBar = new ProgressBar();
addChild(PBar);
PBar.setProgress(10); // gives Error

ProgressBar.as

package  
{
    import flash.display.MovieClip;
    public class ProgressBar extends MovieClip
    {
        private var movie:MovieClip;
        public function ProgressBar() {
            //set initial position
            setPosition(400,400);
        }
        public function setPosition(X:Number,Y:Number):void{
             this.x=X;
             this.y=Y;
        }
        public function setProgress(value:Number):void{
              var progress = Math.round(value); 
              this.goToAndStop(5);
        }
    }
}

Answer 1

这是因为goto必须全部为小写，即gotoAndStop()而不是goToAndStop()。

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/MovieClip.html#gotoAndStop()