文件 Class 中有错误？

Question

我在名称阶段有一个按钮 "butdin" 并将他添加为 class : 我想在您按下文件中的菜单按钮时显示为什么按钮不起作用。 .

package {
import flash.display.MovieClip;
import flash.system.fscommand;
import flash.media.SoundMixer;
import flash.events.Event;
import flash.display.MovieClip;
import flash.display.StageScaleMode;

import fl.display.ProLoader;

import flash.system.fscommand;

import fl.video.FLVPlayback;

import flash.display.StageAlign;
import flash.events.Event;
import flash.events.MouseEvent;

import fl.controls.List;

import flash.display.MovieClip;
import flash.display.DisplayObjectContainer;
import flash.display.SimpleButton;
import flash.display.Graphics;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.text.TextField;
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.display.MovieClip;

import fl.controls.Button;

import flash.display.SimpleButton;

public class butdin extends SimpleButton {
    butdin.addEventListener(MouseEvent.CLICK, sayit);
    public function sayit(e : MouseEvent) : void {
        var list : List = new List();
        list.setSize(361, 291);
        list.move(421, 254);
        var i : uint;
        for (i = 1; i < 8; i++) {
            list.addItem({label:"Track " + i});
        }
        list.addItem({label:"Track 1"});
        list.addItem({label:"Track 2"});
        list.addItem({label:"Track 3"});
        list.addItem({label:"Track 4"});
        list.addItem({label:"Track 5"});
        list.addItem({label:"Track 6"});
        list.addItem({label:"Track 7"});
        addChild(list);
    }
    list.addEventListener(Event.CHANGE, itemClick);
    public function itemClick() {
        status_txt.text = "You selected: " + event.target.selectedItem.label;
    }
}

}

Answer 1

您共享的代码将无法正常工作。因为您创建了按钮 class wrongly.You 正在尝试添加列表并尝试访问文本字段。不可能 anyway.Instead 您可以添加文档 class 。

package  {

    import flash.display.MovieClip;


    public class Main extends MovieClip {

        var list:List;
        public function Main() {
            butdin.addEventListener (MouseEvent.CLICK, sayit);
        }
        private function sayit (e:MouseEvent):void
        {


            list = new List();
            list.setSize (361,291);
            list.move (421, 254);
            //var i:uint;
            //for (i=1; i<8; i++)
            //{
            //list.addItem ( { label: "Track " + i } );
            //}
            list.addItem ( { label: "Track 1" } );//Opens swf file 1.swf in next frame on stage
            list.addItem ( { label: "Track 2" } );//Opens swf file 2.swf in next frame on stage
            list.addItem ( { label: "Track 3" } );
            list.addItem ( { label: "Track 4" } );
            list.addItem ( { label: "Track 5" } );
            list.addItem ( { label: "Track 6" } );
            list.addItem ( { label: "Track 7" } );

            addChild (list);
            list.addEventListener (Event.CHANGE, itemClick);


        }
        private  function itemClick ()
        {

            status_txt.text = "You selected: " + event.target.selectedItem.label;

        }
    }

}

确保导入所有必要的包并且按钮和文本字段具有实例名称

Answer 2

尽量简单，你不需要 butdin class，你可以直接在舞台中插入你的列表，然后创建你的文档 class项目：

package  {

    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.events.Event;

    public class Main extends MovieClip {

        public function Main() {
            butdin.addEventListener(MouseEvent.CLICK, btn_on_Press);
            list.addEventListener(Event.CHANGE, list_on_Change);
        }
        private function btn_on_Press(e:MouseEvent): void {
            for (var i:int = 1; i < 8; i++){
                list.addItem ({ label: 'Track ' + i });
            }
        }
        private function list_on_Change(e:Event): void {
            trace('You selected : ' + e.target.selectedItem.label);
        }
    }

}

希望能帮到你。

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