Question

我有一个MovieClip，里面有一个名为t_bt的按钮。我已将MovieClip导出到操作脚本，并为其指定了e_panel的类名。我使用此代码创建了50个e_panel实例：

var e_p_y:Number=0;

for ( var i:Number=1;i<=50;i++)
{
    var e_p:MovieClip = new e_panel();
    e_p.x = 50;
    e_p.y = e_p_y;
    e_p.t_bt.addEventListener(MouseEvent.MOUSE_UP, f1);
    addChild(e_p);
    e_p_y = e_p_y+105;
}

现在我想要确定用户在功能f1中按下了哪个按钮。

function f1(event:MouseEvent):void
{
    //...what should I write here?
}

Answer 1

每个事件都有一个名为currentTarget的属性，它将引用您添加事件侦听器的对象。

所以在你的情况下：

function f1(event:MouseEvent):void
{
     var t_bt:DisplayObject = event.currentTarget as DisplayObject; //would be the t_bt instance that was clicked (typed as a basic object)
     var e_p:MovieClip = DisplayObject(event.currentTarget).parent as MovieClip //would be the e_p of the item clicked

     //so if you wanted to do something like make the whole panel half transparent once clicked
     e_p.alpha = .5;

     //if you wanted to get the index of the button clicked
     trace("Button Clicked: ", e_p.parent.getChildIndex(e_p));
}

相反，事件的target属性是被点击的实际displayObject（可能与currentTarget或currentTarget的子项相同）

Answer 2

e_panel剪辑必须具有扩展MovieClip的关联E_Panel类，并且（例如）添加索引属性以保存项目的索引。

然后，在f1你可以这样做：

function f1(event:MouseEvent):void
{
    var e_panel:E_Panel = event.currentTarget.parent as E_Panel;
    trace(e_panel.index);
}

请记住在创建影片剪辑时设置索引属性

希望有所帮助

额外信息

为E_Panel创建一个类，并使用库属性

将其链接到movieClip

public class E_Panel extends MovieClip 
{

    private var _index:int;

    public function E_Panel(index:int) 
    {
        super();
        _index = index;
    }

    public function get index():int {
        return _index;
    }
}

然后在你的代码中：

var e_p:E_Panel = new e_panel(i); //"i" is the iteration counter
e_p.x = 50;
... //Etc

Answer 3

试试此代码::

var e_p_y:Number=0;
for ( var i:Number=1;i<=50;i++)
{
    var e_p:MovieClip= new e_panel();
    e_p.x=50;
    e_p.y=e_p_y;
    e_p.t_bt.addEventListener(MouseEvent.MOUSE_UP, f1);
    addChild(e_p);
    e_p_y=e_p_y+105;

    e_p.name= i+'';

}

现在在f1函数::

中编写此代码

function f1(event:MouseEvent):void
{
    trace(event.currentTarget.name);
}

AS3：如何识别按下了哪个按钮？

3 个答案: