如何在舞台上展示物体？答案

【问题标题】：How to display objects on stage?如何在舞台上展示物体？
【发布时间】：2013-01-02 11:38:32
【问题描述】：

我是 actionscript 3.0 的新手，正在尝试编写一些代码。我有一堂课“RadioButtonExample.as”。通过使用这个类，我试图在舞台上显示不同的对象（单选按钮和按钮）。

RadioButtonExample.as

package
{
    import flash.text.TextFieldAutoSize;
    import flash.display.Sprite;
    import flash.events.MouseEvent;
    import fl.controls.RadioButton;
    import fl.controls.RadioButtonGroup;
    import fl.controls.Label;
    import fl.controls.Button;

    public class RadioButtonExample extends Sprite
    {
        private var j:uint;
        private var padding:uint = 10;
        private var currHeight:uint = 0;
        private var verticalSpacing:uint = 30;

    private var sp:Sprite = new Sprite();
        private var rbg:RadioButtonGroup;
        private var questionLabel:Label;
        private var answerLabel:Label;        
        private var question:String = "What day is known internationally as Speak Like A Pirate Day?"
        private var answers:Array = [ "August 12", "March 4", "September 19", "June 22" ];

        public function RadioButtonExample() {
            setupQuiz();    
        }
        private function setupQuiz():void {
            setupQuestionLabel();
            setupRadioButtons();
            setupButton();
            setupAnswerLabel();
        }
        private function setupQuestionLabel():void {
            questionLabel = new Label();
            questionLabel.text = question;
            questionLabel.autoSize = TextFieldAutoSize.LEFT;
            questionLabel.move(padding,padding + currHeight);

            currHeight += verticalSpacing;
            addChild(questionLabel);
        }
        private function setupAnswerLabel():void {
            answerLabel = new Label();
            answerLabel.autoSize = TextFieldAutoSize.LEFT;
            answerLabel.move(padding + 120,padding + currHeight);

            addChild(answerLabel);            
        }
        private function setupRadioButtons():void {
            rbg = new RadioButtonGroup("question1");
            createRadioButton(answers[0], rbg);
            createRadioButton(answers[1], rbg);
            createRadioButton(answers[2], rbg);
            createRadioButton(answers[3], rbg);
        }
        private function setupButton():void {
            var b:Button = new Button();
            b.move(padding,padding + currHeight);
            b.label = "Check Answer";
            b.addEventListener(MouseEvent.CLICK,checkAnswer);

            addChild(b);
        }
        private function createRadioButton(rbLabel:String,rbg:RadioButtonGroup):void {
            var rb:RadioButton = new RadioButton();
            rb.group = rbg;
            rb.label = rbLabel;
            rb.move(padding, padding + currHeight);
            addChild(rb);

            currHeight += verticalSpacing;
        }
        private function checkAnswer(e:MouseEvent):void {
            if(!rbg.selection.label) answerLabel.text = "Select an answer.";
            else {
                var resultStr:String = rbg.selection.label == answers[2] ? "Correct" : "Incorrect";
                answerLabel.text = resultStr;
            }
        }
    }
}

另一方面，我有main.fla 文件，它在时间轴的第一帧上有以下代码。

main.fla

import RadioButtonExample;
var rbe:RadioButtonExample = new RadioButtonExample();

在编译 FLA 文件时，它不会给出任何编译器错误，但不会在舞台上显示任何单选按钮和简单按钮。

请注意，我已经通过在 FLA 文件的属性面板下的类文本框中写入类名称来尝试此操作，但我不想这样做。我想使用代码实现这一点。请让我知道应该在代码中添加什么以在舞台上显示对象。请帮我看看我做错了什么。

【问题讨论】：

标签： flash stage

【解决方案1】：

嗯，这可能是不对的，因为我是菜鸟，但我注意到你没有像标准那样建立它：

    package {

import flash.display.MovieClip;

import flash.text.TextFieldAutoSize;
import flash.display.Sprite;
import flash.events.MouseEvent;
import fl.controls.RadioButton;
import fl.controls.RadioButtonGroup;
import fl.controls.Label;
import fl.controls.Button;

public class RadioButtonExample extends MovieClip {

也许这可以为您指明正确的方向

【讨论】：