如何调用动态单选按钮中的功能？

Question

我使用 XML 创建了一个测验应用程序。

我的 XML 代码：

<item>
 <question type="singleChoice">
 <![CDATA[1.What does CSS stand for?]]>
 </question>
  <answer correct="yes">Cascading Style Sheets</answer>
  <answer>Computer Style Sheets</answer>
  <answer>Colorful Style Sheets</answer>
  <answer>Creative Style Sheets</answer>
</item>

和我的 Flex 脚本代码：

    protected function buildQuestion():void {
            var question:XML=XML(xmlList[quizIndex])
                answerOption.removeAllElements()
                if(question.question.@type == SINGLE_CHOICE)
                {
                    for each(var tempxml:XML in question.answer)    
                    {
                        var rad:RadioButton= new RadioButton();
                        rad.label=tempxml[0];
                        answerOption.addElement(rad);
                    }       
                }

如何访问当前单选按钮来验证此答案？

Answer 1

您可以使用 spark.components.RadioButtonGroup 为此：

protected function buildQuestion():void 
{
    var question:XML = XML(xmlList[quizIndex]);
    answerOption.removeAllElements();
    if (question.question.@type == SINGLE_CHOICE)
    {
        var group:RadioButtonGroup = new RadioButtonGroup();
        group.addEventListener(Event.CHANGE, onAnswerChanged);
        for each(var tempxml:XML in question.answer)    
        {
            var rad:RadioButton = new RadioButton();
            rad.label = tempxml[0];
            rad.group = group;
            rad.value = tempxml[0];
            answerOption.addElement(rad);
        }       
    }
}

private function onAnswerChanged(event:Event):void
{
    var group:RadioButtonGroup = RadioButtonGroup(event.currentTarget);
    trace ("Selected answer: " + group.selectedValue);
}