actionscript-3 - AS3 从一个类到另一个类调度自定义事件

Question

我想将自定义事件从 Country() 发送到 MenuButton()；

国家事件

package  {
import flash.events.Event;

public class CountryEvent extends Event {

    public static const COUNTRY_HOVERED:String = "onCountryOver";

    private var _countryName:String = "";

    public function CountryEvent(type:String, countryName:String, bubbles:Boolean=true, cancelable:Boolean=false) {
        super(type, bubbles, cancelable);
        _countryName = countryName;
    }

    public function get countryName():String {
        return _countryName;
    }

    public override function clone():Event
    {
        return new CountryEvent(type,countryName,bubbles,cancelable);
    }
}

}国家级

package 
{

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

    public class Country extends MovieClip
    {
        private var countryEvent:CountryEvent;


        public function Country()
        {
            this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
            this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
        }

        private function onMouseOver(e:MouseEvent):void
        {

                countryEvent = new CountryEvent("onCountryOver",this.name);

                dispatchEvent(countryEvent);

            }
        }

        private function onMouseOut(e:MouseEvent):void
        {

        }
    }

}

菜单按钮类

package  {

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


    public class MenuButton extends MovieClip {

        public var countryName:String = "";

        public function MenuButton() {

            this.buttonMode = true;
            this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
            this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
            this.addEventListener(CountryEvent.COUNTRY_HOVERED,onCountryOver);
        }

        private function onCountryOver(e:CountryEvent):void {
            if(e.countryName == countryName) {
                this.gotoAndPlay(2);
            }
        }

        private function onMouseOver(e:MouseEvent):void {
            this.gotoAndPlay(2);

        }

        private function onMouseOut(e:MouseEvent):void {
            this.gotoAndPlay(11);
        }
    }

}

当悬停一个国家/地区时，将调度一个自定义事件，我希望 MenuButton 监听该事件，如果传递的参数与其名称相同，则突出显示。 Country 类是我在舞台上的国家电影片段的基类，MenuButton 是菜单按钮的基类

事件好像一直没过完

提前致谢

Answer 1

你必须做两个修改:

首先，将您的事件 bubbles 属性设置为 true，这样当 Country 剪辑分派(dispatch)一个事件时，它将上升到顶层.

那么您的 MenuButtons 应该听从 stage，而不是它们自己。因此，当 Country 调度事件时，它会上升到 stage 并且可以被按钮捕获。如果你想听舞台，你必须对你的代码做一些小改动:

public function MenuButton() {

    this.buttonMode = true;
    this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
    this.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
    this.addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
}

private function onAddedToStage(e:Event):void 
{
    removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
    stage.addEventListener(CountryEvent.COUNTRY_HOVERED,onCountryOver); 
}