重新加载组件，但在Flex中保持相同的实例

var myCanvasPage:myCanvas = new myCanvas;
this.addChild(myCanvasPage);

this.removeChild(myCanvasPage);
var myCanvasPage:myCanvas = new myCanvas;
this.addChild(myCanvasPage);

var myCanvasPage:myCanvas = new myCanvas;

public var myCanvasPage:myCanvas = new myCanvas;

this.myCanvasPage

this.addChild(this.myCanvasPage);

this.addChild(this.myCanvasPage);
this.removeChild(this.myCanvasPage);