Be careful about the "id" property

最新推荐文章于 2025-12-18 16:35:26 发布

原创最新推荐文章于 2025-12-18 16:35:26 发布 · 412 阅读

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#imagelist #function #image #list #flex #each

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本文探讨了在InFlex框架中正确使用组件ID的方法。强调了避免将数据ID作为组件ID的重要性，并通过示例展示了如何在List控件中正确获取项目源与ID，确保应用程序的稳定运行。

In Flex, every component is identified by its unique id property. Therefore, in your own data, it's better not to use id as a property.

In the following function, imageList is a List control, the id of each item is not the id of its data provider.

The original data is "<Image source="..." imageId="..."/>"

  <mx:List width="120" height="100%" id="imageList"
      dataProvider="{images}" itemRenderer="ImageItem"
      change="onChange()" dropShadowEnabled="true" borderStyle="solid" borderThickness="2"></mx:List>

.......

public function onChange():void
{
    //Alert.show(imageList.selectedItem.id.toString());
    imgChara.source=imageList.selectedItem.source;
    imageId=imageList.selectedItem.imageId;
}

The following code does not work correctly!

if the original data is "<Image source="..." id="..."/>"

public function onChange():void
{
    //Alert.show(imageList.selectedItem.id.toString());
    imgChara.source=imageList.selectedItem.source;
    imageId=imageList.selectedItem.id;
}