删除Flex中TREE组建里的文件夹图标.

<mx:Style>

    Tree {

        folderClosedIcon: ClassReference(null);

        folderOpenIcon: ClassReference(null);

    }

</mx:Style>

<?xml version="1.0" encoding="utf-8"?>

<!-- http://blog.flexexamples.com/2008/01/25/removing-folder-icons-from-the-flex-tree-control/ -->

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

        layout="vertical"

        verticalAlign="middle"

        backgroundColor="white">

    <mx:XML id="dp">

        <mlb>

            <league label="American League">

                <division label="East">

                    <team label="Boston" />

                    <team label="New York" />

                    <team label="Toronto" />

                    <team label="Baltimore" />

                    <team label="Tampa Bay" />

                </division>

                <division label="Central">

                    <team label="Cleveland" />

                    <team label="Detroit" />

                    <team label="Minnesota" />

                    <team label="Chicago" />

                    <team label="Kansas City" />

                </division>

                <division label="West">

                    <team label="Los Angeles" />

                    <team label="Seattle" />

                    <team label="Oakland" />

                    <team label="Texas" />

                </division>

            </league>

        </mlb>

    </mx:XML>

    <mx:Style>

        Tree {

            folderClosedIcon: ClassReference(null);

            folderOpenIcon: ClassReference(null);

        }

    </mx:Style>

    <mx:Tree id="TreeProject"

            dataProvider="{dp.league}"

            labelField="@label"

            iconField="@icon"

            showRoot="true"

            width="320"

            rowCount="9" />

</mx:Application>