Question

AS3.0高手来帮忙下 谢谢 类 TestRect$ 必须继承 Sprite 的属性，才能链接到根。

我是新手，不知道这是什么问题，对照AS3.0 COOKBOOK做的 怎么不行呢？

我建立了一个ActionScript Project
写好后，这样提示：
TypeError: Error #2023: 类 TestRect$ 必须继承 Sprite 的属性，才能链接到根。
/*********************代码如下*************************
package {
import flash.display.*
import flash.text.*;
import flash.filters.DropShadowFilter;

public class TestRect extends SimpleButton
{
private var _text:String;
private var _width:Number;
private var _height:Number;
public function TestRect(text:String,width:Number,height:Number)
{
_text=text;
_width=width;
_height=height;

upState=createUpState();
overState=createOverState();
downState=createDownState();
hitTestState=upState;
}
private function createUpState( ):Sprite {
var sprite:Sprite = new Sprite( );
var background:Shape = createdColoredRectangle( 0x33FF66 );
var textField:TextField = createTextField( false );
sprite.addChild( background );
sprite.addChild( textField );
return sprite;
}
private function createOverState( ):Sprite {
var sprite:Sprite = new Sprite( );
var background:Shape = createdColoredRectangle( 0x70FF94 );
var textField:TextField = createTextField( false );
sprite.addChild( background );
sprite.addChild( textField );
return sprite;
}
private function createDownState( ):Sprite {
var sprite:Sprite = new Sprite( );
var background:Shape = createdColoredRectangle( 0xCCCCCC );
var textField:TextField = createTextField( false );
sprite.addChild( background );
sprite.addChild( textField );
return sprite;
}
private function createdColoredRectangle( color:uint ):Shape {
var rect:Shape = new Shape( );
rect.graphics.lineStyle( 1, 0x000000 );
rect.graphics.beginFill( color );
rect.graphics.drawRoundRect( 0, 0, _width, _height, 15 );
rect.graphics.endFill( );
rect.filters = [ new DropShadowFilter( 2 ) ];
return rect;
}
private function createTextField( downState:Boolean ):TextField {
var textField:TextField = new TextField( );
textField.text = _text;
textField.width = _width;
var format:TextFormat = new TextFormat( );
format.align = TextFormatAlign.CENTER;
textField.setTextFormat( format );
textField.y = ( _height - textField.textHeight ) / 2;
textField.y -= 2; // Subtract 2 pixels to adjust for offset

if ( downState ) {
textField.x += 1;
textField.y += 1;
}
return textField;
}
}
}
对了，在Flex build 3 里面建立工程写的。

Answer 1

public class TestRect extends SimpleButton
你的TestRect扩展於SimpleButton
你应该导入SimpleButton这个包的定义才行吧