动态创建Text或者Label并且控制文本颜色以及透明度

var tf:TextField = createTextField(10, 10, 100, 300);
 tf.textColor=0xff0000;   //文本颜色设置为红色
 tf.text="dddd"
 
 function createTextField(x:Number, y:Number, width:Number, height:Number):TextField {
            var result:TextField = new TextField();
            result.x = x;
            result.y = y;
            result.width = width;
            result.height = height;
   this.blendMode = BlendMode.LAYER;  //注意：必须加此句，否则透明度不起作用，注释：强制为该显示对象创建一个透明度组
   result.alpha=0.2;
            addChild(result);
            return result;
        }