Flex中禁用Combobox的可编辑属性和添加prompt属性

Flex中禁用Combobox的可编辑属性和添加prompt属性

Flex中可以选择使用Dropdownlist或者Combobox来实现一些下拉列表的功能，通过本实例，Dropdownlist和Combobox基本上实现了同等功能转换

Combobox禁用了inputtext的可编辑属性。闲言碎语不要讲，我有代码来呈上！

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx" viewSourceURL="srcview/index.html">
 
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.events.FlexEvent;
 
            import spark.events.DropDownEvent;
 
            private var arr:Array=[{label:"Red"},{label:"Orange"},{label:"Yellow"},{label:"Blue"},{label:"Green"}];
            [Bindable]
            private var myData:ArrayCollection=new ArrayCollection(arr);
 
            protected function combobox1_creationCompleteHandler(event:FlexEvent):void
            {
                this.cb.textInput.text="Please Select";
            }
 
            protected function cb_closeHandler(event:DropDownEvent):void
            {
                this.cb.setStyle("skinClass",undefined);
            }
 
        ]]>
    </fx:Script>
    <s:layout>
        <s:VerticalLayout verticalAlign="middle" horizontalAlign="center"/>
    </s:layout>
    <s:ComboBox id="cb" skinClass="com.MyComboBox" dataProvider="{myData}"
                creationComplete="combobox1_creationCompleteHandler(event)" close="cb_closeHandler(event)"/>
 
</s:Application>