我还在学习面向对象的编程......
我制作了自己的简单按钮类来执行水平按钮列表。我工作正常,但是...
package as3Classes {
import flash.display.Graphics;
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.events.Event;
import flash.text.TextField;
import flash.events.MouseEvent;
import fl.motion.MotionEvent;
import flash.text.TextFormat;
public class simpleButton extends MovieClip {
//var nome:String = new String();
var sub:Sprite = new Sprite();
public var realce:Sprite = new Sprite();
public var titulo:String;
public function simpleButton(nomeId:String, texto:String) {
this.name = nomeId;
this.titulo = texto;
this.useHandCursor = true;
this.buttonMode = true;
this.mouseChildren = false;
var txtf:TextFormat = new TextFormat();
txtf.font = "Arial";
var txt:TextField = new TextField();
txt.wordWrap = false;
txt.multiline = false;
txt.text = texto;
txt.setTextFormat(txtf);
txt.width = txt.textWidth+4;
txt.height = 22;
txt.x = 4;
txt.y = 2;
txt.cacheAsBitmap = true;
var fundo:Sprite = new Sprite();
fundo.graphics.beginFill(0xCCCCCC);
fundo.graphics.drawRect(0, 0, txt.width+8, 22);
fundo.graphics.endFill();
//var realce:Sprite = new Sprite();
this.realce.graphics.beginFill(0x00CC00);
this.realce.graphics.drawRect(0, 0, txt.width+8, 22);
this.realce.graphics.endFill();
this.sub.graphics.beginFill(0xFF0000);
this.sub.graphics.drawRect(0, 0, txt.width+8, 2);
this.sub.graphics.endFill();
this.addChild(fundo);
this.addChild(this.realce);
this.addChild(this.sub);
this.addChild(txt);
this.sub.alpha = 0;
this.sub.y = 22;
this.addEventListener(MouseEvent.MOUSE_OVER, mouseover);
this.addEventListener(MouseEvent.MOUSE_OUT, mouseout);
}
private function mouseover(e:MouseEvent){
sub.alpha = 1;
}
private function mouseout(e:MouseEvent){
sub.alpha = 0;
}
}
}
...当我尝试访问“titulo”或将“realce”设置为 alpha=1(以将其显示为单击时)它返回未定义。我只能设置或读取继承的属性,如名称、字母等。我的概念错误是什么?