这里有两个问题，我不太明白你为什么这样工作，但是，

1：当我尝试编译你的代码时，出现编译时错误：

你的课程末尾缺少“}”。

我删除了未使用的内容：

package {
    import flash.events.MouseEvent;
    import flash.display.SimpleButton;
    import flash.display.MovieClip;
    public class ClickButton extends SimpleButton {
        public function ClickButton() {
        }
        public function GotoSession(sesBut:SimpleButton,frameLabel:String,sceneName:String):void {
            sesBut.addEventListener(MouseEvent.CLICK,gotoSes);
            function gotoSes(event:MouseEvent):void {
                MovieClip(root).gotoAndStop(frameLabel,sceneName);
               // and if You want to remove the ClickButton instance :;
               // ADD those two lines :
               sesBut.removeEventListener(MouseEvent.CLICK,gotoSes);
               MovieClip(root).removeChild(sesBut);
               // DO NOT forget to remove the Listeners before to remove an instance!
            }
        }
    }
}

我想你的库中有一个按钮链接到 ClickButton 类，如下所示：

所以：

var btn1:ClickButton = new ClickButton();
addChild(btn1);
btn1.GotoSession(btn1, "menu", "Home");
stop();

如果我单击 btn1，这会将我带到标签处的“主页”场景“菜单”。

这非常有效。

在 frameLabel “菜单”上：

stop();
trace("currentScene.name = " + this.currentScene.name);
trace("currentFrameLabel = " + this.currentFrameLabel);

/*
OUTPUT : 
currentScene.name = Home
currentFrameLabel = menu
*/

[编辑]

如果我将visibility设置为false，然后再设置为true，如果我想更改mc_1的alpha属性，我也会遇到同样的问题。 这适用于我的文件：

import flash.display.MovieClip;
stop();
trace("currentScene.name = " + this.currentScene.name);
trace("currentFrameLabel = " + this.currentFrameLabel);
var mc_1:MovieClip = mc_1;
// If I don't add this line, I have the same problem when I set the visibility to true
var mc_2:MovieClip = mask_mc;
var mc_3:MovieClip = red_mc;
// I do the same for mc_2 labeled "mask_mc"
// mc_1 is now always recognized as a MovieClip as mc2.
mc_1.visible = false;
mc_1.visible = true;
// No more problem if I add the line var mc_1:MovieClip = mc_1;
// If I don't do this, I cannot access mc_1 as a MovieClip
mc_1.alpha = 0.5;
mc_1.mask = mc_2;
mc_3.alpha = 0.5;
mc_3.visible = false;
mc_3.visible = true;
mc_3.alpha = 0.9;
// It seems that You have to declare the MC variables before to change the properties

[/编辑]

但我不明白您的行：

//btn1.GotoSession(home, "menu", "Home");

home为空（您没有对名为home的ClickButton的任何引用）......???

您还可以创建一个 ClickSomeButton 类 带有静态方法“gotoLand”

package {
import flash.events.MouseEvent;
import flash.display.SimpleButton;
import flash.display.MovieClip;

public class ClickSomeButton{
    public static function gotoLand(target:MovieClip,sesBut:SimpleButton,frameLabel:String,sceneName:String):void {
            sesBut.addEventListener(MouseEvent.CLICK,gotoSes);
            function gotoSes(event:MouseEvent):void {
                target.gotoAndStop(frameLabel,sceneName);
                target.removeEventListener(MouseEvent.CLICK,gotoSes);
                target.removeChild(sesBut);
            }
        }
    }
}

然后在您的 fla 中：

var btn2:Btn2 = new Btn2();
addChild(btn2);
btn2.x = 200;
ClickSomeButton.gotoLand(this,btn2, "menu", "Home")
stop();

库中 Btn2 的符号属性：

这只是因为我不知道为什么如果您调用此实例的方法，您必须将按钮作为参数传递... 就像您在原始问题中所做的那样：

//btn1.GotoSession(btn1, "menu", "Home");

您的 ClickButton 类中的这一点很奇怪...