Flex RadioButton控件

介绍

单选按钮控件允许用户在一组互相排斥的选择中进行单个选择。

类声明

以下是 spark.components.RadioButton 类的声明:

public class RadioButton 
   extends ToggleButtonBase
      implements IFocusManagerGroup

公共财产

公共方法

继承的方法

此类继承以下类中的方法:

• spark.components.supportClasses.ToggleButtonBase

• spark.components.supportClasses.ButtonBase

• spark.components.supportClasses.SkinnableComponent

• mx.core.UIComponent

• mx.core.FlexSprite

• flash.display.Sprite

• flash.display.DisplayObjectContainer

• flash.display.InteractiveObject

• flash.display.DisplayObject

• flash.events.EventDispatcher

• Object
  

Flex单选按钮控件示例

让我们按照以下步骤通过创建测试应用程序来检查Flex应用程序中单选按钮控件的使用:

以下是修改后的mxml文件 src / com.tutorialspoint / HelloWorld.mxml 的内容。

<?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"
   width="100%" height="100%" minWidth="500" minHeight="500"
   >
   <fx:Style source="/com/tutorialspoint/client/Style.css"/>
   <fx:Script>
      <![CDATA[
         [Bindable]
         private var selectedOption:String = "";

         protected function option_clickHandler(event:MouseEvent):void
         {
            var radioButton:RadioButton = event.target as RadioButton;
            switch (radioButton.id){
               case option1.id:
                  selectedOption = option1.label;
                  break;
               case option2.id:
                  selectedOption = option2.label;
                  break;
               case option3.id:
                  selectedOption = option3.label;
                  break;
               case option4.id:
                  selectedOption = option4.label;
                  break;
            }			
         }
      ]]>
   </fx:Script>
   <s:BorderContainer width="550" height="400" id="mainContainer" 
   styleName="container">
      <s:VGroup width="100%" height="100%" gap="50" 
      horizontalAlign="center" verticalAlign="middle">
         <s:Label id="lblHeader" text="Form Controls Demonstration" 
         fontSize="40" color="0x777777" styleName="heading"/>
         <s:Panel id="radioButtonPanel" title="Using RadioButton" 
         width="420" height="200" >
            <s:layout>
               <s:VerticalLayout  gap="10" verticalAlign="middle"
               horizontalAlign="center"/>	
            </s:layout>
            <s:RadioButton groupName="options" id="option1" 
               label="item #1" width="150" 
               click="option_clickHandler(event)"/>
            <s:RadioButton groupName="options" id="option2" 
               label="item #2" width="150" 
               click="option_clickHandler(event)"/>
            <s:RadioButton groupName="options" id="option3" 
               label="item #3" width="150" 
               click="option_clickHandler(event)"/>
            <s:RadioButton groupName="options" id="option4" 
               label="item #4" width="150" 
               click="option_clickHandler(event)"/>
            <s:Label id="selectedOptionLabel" fontWeight="bold" 
               text="Item selected: {selectedOption}" width="150"/>
         </s:Panel>
      </s:VGroup>	 
   </s:BorderContainer>	
</s:Application>

准备好所有更改后，让我们以正常模式编译和运行应用程序，就像在 Flex - 创建应用程序中一样 章节。 如果一切顺利，您的应用程序，这将产生以下结果:[在线试用]