flex 操作TabNavigator子视图遇到的null值异常

flex嵌入字体

Hey,buddy! How are you doing these days?All right,Let us straight to the point.
flex嵌入字体有两种方式：
方式1，直接嵌入：
[Embed(mimeType='application/x-font', source='font/minicartoon.ttf', fontName='迷你简卡通')]
private var mnCartonFont:Class;
&nbs ......

flex实例效果图

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" verticalAlign="top" applicationComplete="init()">
<mx:Script>
<![CDATA[

import mx.events.ItemClickEvent;
import mx.collections.ArrayCollection ......

flex tree 添加右键菜单

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12">
<mx:Script>
<!--[CDATA[
import mx.controls.Alert;

public var newBuildMenuItem:ContextMenuItem;//菜单项变量

private ......

[Flex 2] 00 Introduction

===============================
   图灵程序设计丛书（Web开发系列）
===============================
  The Essential Guide to Flex 2 with ActionScript 3.0
   &nb ......