Question

我有一些带按钮的VBox。我希望我的按钮在点击后更改标签。我正在尝试使用代码隐藏实践，但按钮的实例始终为null。有代码：

package TestPackage 
{
    import mx.containers.VBox;
    import mx.controls.Button;
    public class ControlsBox extends VBox 
    {
        [Bindable]
        public var btnPlay : Button;
        public function ControlsBox() 
        {
            super();
        }
        override protected function childrenCreated():void
        {
            super.childrenCreated();
        }
        public function ChangeImage():void
            {
                btnPlay.label = "a";
            }
    }
}

Here is mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    xmlns:controls="TestPackage.*">
<controls:ControlsBox id="ctrlVBox">
        <mx:Button id="btnPlay" click="this.ctrlVBox.ChangeImage();" label="c"></mx:Button>
</controls:ControlsBox>
</mx:Application>

我做错了什么？以及如何正确地做到这一点？感谢

Answer 1

我不会经常在flex中这样做，但我认为你想要这样的东西：

<controls:ControlsBox id="ctrlVBox">
   <controls:btnPlay>
      <mx:Button click="this.ctrlVBox.ChangeImage();" label="c"></mx:Button>
   </controls:btnPlay>
</controls:ControlsBox>

Flex 3：代码隐藏问题

1 个答案: