Question

我创建了一个非常基本的自定义偶数类。但是当调用一个事件然后将该事件转发给另一个类时，我遇到了“无法将thisEvent转换为thisOtherEvent”错误。

我意识到这是因为我需要在我的自定义事件中覆盖克隆功能，如下所示：

package com
{

 import flash.disply.*;
 import flash.events.Event;

 public class MyCustomEvents extends Event
 {

  public static const SOME_EVENT:String = "some_event";
  public var info:Object;

  public function MyCustomEvents($type:String, $info:Object,$bubbles:Boolean = false, $cancelable:Boolean = false)
  {

   super($type, $bubbles, $cancelable);
   this.info = $info;

  }

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

 }
}

但是，当我发送事件时，我仍然收到此错误。还有什么我可能会遗失的吗？

这是错误： TypeError: Error #1034: Type Coercion failed: cannot convert com.greensock.events::TransformEvent@d8df709 to com.customEvents.MyCustomEvents.

我尝试在代码中强制转换事件：

var deleteImgEvent:MyCustomEvent = new MyCustomEvent(MyCustomEvents.IMAGE_DELETE, {imgData: getImg}, true, false); this.dispatchEvent(deleteImgEvent as MyCustomEvents);

仍然没有运气。

更新：

好的，似乎问题出在greensock Transform库中。当我调用自定义事件的事件处理程序时，我运行了一个TransformManager类的函数。

_manager.deleteSelection();

在该类中，它调度了一个TransformEvent。不知道为什么，但它正在读取删除事件作为MyCustomEvent。

Answer 1

/**
 * @usage
 * var myEvent:CustomEvent = new CustomEvent(CustomEvent.EVENT_TYPE_A, { integerRelatedToEvent: 5, stringRelatedToEvent: 'easy' });
 * addEventListener(CustomEvent.EVENT_TYPE_A, traceCustomEvent);
 * dispatch(myEvent);
 * function traceCustomEvent ($e:CustomEvent):void {
 *  trace($e.type);
 * }
 */
package {
    import flash.events.Event;

    public class CustomEvent extends Event {
        // Types:
        public static const EVENT_TYPE_A:String = 'CustomEvent.EVENT_TYPE_A';
        public static const EVENT_TYPE_B:String = 'CustomEvent.EVENT_TYPE_B';
        // Components:
        private var _customDatum:Object;
        public function get customDatum ():Object { return _customDatum; }


        public function CustomEvent ($type:String, $customDatum:Object) {
            super($type);
            _customDatum = $customDatum;
        }

        public override function clone ():Event {
            return new CustomEvent(type, _customDatum);
        }
    }
}

“创建自己的自定义事件时 class，你必须覆盖继承 Event.clone（）方法为了它 复制你的属性自定义类。如果你没有全部设置您添加的属性事件子类，那些属性将没有正确的值时侦听器处理redispatched 事件“。

Answer 2

package com.events;
{
import flash.events.Event;
public class XMLLoaderEvent extends Event
{
    public static const XML_LOADED:String = "XML_Loaded";
    public var data:*;
    public var properties:Object;

    public function XMLLoaderEvent( type:String,_data:*,bubbles:Boolean = false,cancelable:Boolean = false):void
    {
        super( type, bubbles, cancelable );
        data = _data;
    }

    // Override clone
    override public function clone():Event
    {
        return new XMLLoaderEvent( type, data, bubbles, cancelable);
    }
}
}

Answer 3

不知道是不是这样，但你的自定义事件中有一个额外的参数$info:Object，但你没有在克隆构造函数中传递它。

return new MyCustomEvents(type, info, bubbles, cancelable);

Answer 4

我认为您需要clone函数来返回MyCustomEvents类型。不是事件类型。您需要添加上一张海报所述的info参数。

package com {

    import flash.display.*;
    import flash.events.Event;

    public class MyCustomEvents extends Event {

    public static const SOME_EVENT:String = "some_event";
    public var info:Object;

        public function MyCustomEvents($type:String, $info:Object,$bubbles:Boolean = false, $cancelable:Boolean = false) {
            super($type, $bubbles, $cancelable);
            this.info = $info;
        }
        public override function clone():MyCustomEvents {
            return new MyCustomEvents(this.type, this.info, this.bubbles, this.cancelable);
        }
    }
}

在AS3的自定义事件中覆盖Clone（）...需要帮助

4 个答案: