One of the first decisions that you must make when creating custom components is deciding whether to write
them in MXML or in ActionScript. Ultimately, it is the requirements of your application that determine how you
develop your custom component.
Some basic guidelines include the following:

•MXML components and ActionScript components both define new ActionScript classes.
•Almost anything that you can do in a custom ActionScript custom component, you can also do in a custom MXML component. However, for simple components, such as components that modify the behavior of an existing component or add a basic feature to an existing component, it is simpler and faster to create them in MXML.
•When your new component is a composite component that contains other components, and you can express the positions and sizes of those other components using one of the Flex layout containers, you should use MXML to define your component.
•To modify the behavior of the component, such as the way a container lays out its children, use ActionScript.
•To create a visual component by creating a subclass from UIComponent, use ActionScript.
•To create a nonvisual component, such as a formatter, validator, or effect, use ActionScript.
•To add logging support to your control, use ActionScript. For more information, see “Logging” on page 227 in Building and Deploying Adobe Flex 3 Applications.

Flex3 官方文档中如上释疑. 2010年我参加Flex Developer Day时, 有开发者提问国内是否有大型企业应用实例? 未得到正面回答. 倒是群硕的团队还上台张扬了一把, 他们的项目大约是奥运时CCTV直播网站.

其实即便国内有大型的企业应用, 也不一定能获得足够价值的经验.

07年底开始做的教育应用, 大致有120W行代码, 其中有60%+的为AS代码, 除了入口文件及部分复杂UI使用MXML之外, 清一色都是AS代码, 所有的UI都小心谨慎的创建, 销毁. 在10年的DevDay时, 坐在我旁边的某研发他们也是纯AS.

几年过去了, Flex贡献给了Apache, Flex也已经4.6了, 接触的代码多了, 习惯了清纯的AS代码, 当满篇都是MXML标签时, 我不淡定了.

思想斗争良久, 到底孰优孰劣? 在多数common的情况下, 几乎不分上下. 我觉得AS代码更优雅更易读, 可人家说了: 我们可以Design, 不用代码, 一眼就看出来了…:(

如上View, 假如我们只用MXML或只用AS来实现, 似乎看不出明显差异来, 其实相比选择编程方式, 可能对组件/Class的划分可能更加重要.

不论用MXML还是AS, Class设计好更加关键:

1.1.1 可以设计成一个Common的组件;

1.1 可以作为一个组合的UserList

2.1/2.2  作为显示用户基本信息的组件;

这样划分, 不论MXML还是AS都可以很好的降低耦合, 更可重用, 但不论如何, 我还是喜欢干净的AS代码.

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http://www.eclipse.org/subversive/documentation/gettingStarted/aboutSubversive/install.php

Update sites:

Indigo 3.7

Update Site is a part of Indigo Update Site. Look at Help > Install New Software… > select Indigo – http://download.eclipse.org/releases/indigo > Collaboration Tools

Helios 3.6

Update Site is a part of Helios Update Site. Look at Help > Install New Software… > select Helios – http://download.eclipse.org/releases/helios > Collaboration Tools

Galileo 3.5

Try: http://download.eclipse.org/releases/galileo> Collaboration Tools

Or: http://subclipse.tigris.org/update_1.6.x

more info: http://www.eclipse.org/subversive/downloads.php

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之前有看到微博上转来转去的flash runtime白皮书. 我没有太多兴趣参与他们的讨论, 也只是今天才有空扫了两眼”Adobe’s view of Flex and its commitments to Flex in the future”

07年底开始接触使用Flex, 08年开始做项目, 掐指一算, 四五年过去了. 记得最开始看的一本书是打印出来的<< Programming Flex 2: The Comprehensive Guide to Creating Rich Internet Applications with Adobe Flex>> 光阴似箭, 由2及3, 直到如今的4.6;

上个月公司采购了一批FlashBuilder4.6的授权, 相比4.0, 4.6需要更高的配置, 无奈之下, 我们纷纷转回4.0.  其实从4.0开始, 我就一直不断的抱怨, 甚至有很多次对着电脑骂娘, 但是这都无济于事, 骂娘也得继续用它.

Flex的build效率也不敢恭维, 平日工作里, 我们需要暂定若干个一分钟来等待一个小module的编译.

大多时候, 我觉得Flex是个不错的框架, 不论对于企业级应用还是面向消费者的软件都是不错的选择. 虽然Flex有很多不足之处, 但并不能掩盖其在RIA领域的地位. Flex贡献给Apache后, 有很多人开始摇摆不定, 但我并不觉得HTML5能在企业应用领域盖得过Flex.

我对Flex的社区, 尤其是中文社区, 从来都没有丝毫的归属感.  太多的游戏, flash, 很少很少看到有人讨论企业级应用. 多数的活动都与我无关. 微博上的帖子也是flash, 3D, gaming. 似乎Flex正在远去, 大家更喜欢用flash这个词语. 很多猎头向我抱怨, 为什么懂Flex的人这么难找? 于此对应的是, 去年有一个国内AS大站的’运营’联系我, 要给我介绍一个Flex的工作: 公司是一家房地产公司. 可能是做3D效果.对于这样的机会, 我只能一笑而过.

春天正在北上, 我继续一笑而过.

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轻快吗? 流畅吗? 清晰易懂吗? 我抱着试试看的态度开始接纳不太熟悉的世界.

1. 完全没有代码提示, 代码基本靠手；

2. 不论怎么写, 在编译时都不会有问题, 漫长的编译之后发现细小的笔误才, 蛋疼的感觉滚滚而来.

3. 如果一个method接受一个XML的参数, 该如何写注释? 你不把xml范例写上, 别人知道你要干球??

4. 没有Class, 我要重写下toString()该怎么写? 我要写个只读method该写到哪?

5. 重构呢? search + 替换?

xml的易错性 + Flex编译耗时久 = 蛋疼.

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把把都得翻书找手册   弱到爆

Trace到的结果:

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ref:http://help.adobe.com/en_US/ActionScript/3.0_ProgrammingAS3/WS5b3ccc516d4fbf351e63e3d118a9b90204-7f87.html

Note: when you convert a string to boolean, remeber to trim the string first.

and this is a capture from <<Essential ActionScript 3.0>>:

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You can check the local storage setting for current domain by right click, or check all setting from Control Panel>FlashPlayer, additionally, you can manage all settings by this: http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html

Flashplayer need the user configure this setting manually, but some times we want change the setting automatically, especially for some enterprise application, like E-Learning, Banking, HIS.

Currently, I did not found any API or workaround to change the local storage automatically

I just write a small tool to check the local storage setting directly, >>Link<<
(you may download and upload this swf to your server if needed)

/**
	 * Check local storage setting.
	 */
	protected function checkLocalStorage(event:MouseEvent):void
	{
		var sharedObjectForTest:SharedObject = SharedObject.getLocal("sharedObjectTest", "/");

		sharedObjectForTest.addEventListener(NetStatusEvent.NET_STATUS, onSharedObjectEvent);
		sharedObjectForTest.data.result = "OK";
		try
		{
			var result:String = sharedObjectForTest.flush();
			if(result == SharedObjectFlushStatus.FLUSHED) {
				traceLog("OK, and currect size is: " + sharedObjectForTest.size);
			}else {
				traceLog("Failed, and the Flashplayer security setting panel is shown.");
			}
		}
		catch(error:Error)
		{
			traceLog("Error, and show the seeting panel manually;");
			Security.showSettings(SecurityPanel.LOCAL_STORAGE);
		}
	}

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由于之前采购过不同版本的FB, 具体序列号对应版本早已记不清楚, 于是微博上@了几个专家, 尚未收到任何答复的情况下直接拨打Adobe的客服:

中国10800 744 0438（通过联通），或 10800 440 0421（通过电信）[http://shop.adobe.com/store/adbehcn/Content/pbPage.faq]

报出序列号之后客服耐心回答了版本跟授权的问题.

从4.0升级到4.5大致需要415RMB, 从4.5到4.6是不需要费用的, 明年回来就有4.6可用了….

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<XeSex sexIDElement='MID'> <SexID> M </SexID> <Name> Male </Name> <Active> y </Active> <Code> M </Code> </XeSex>

Attitude:  sexIDElement = ‘MID’;
Element: Name = Male

trace(xmlTest.hasOwnProperty('@sexIDElement')); // check if the attribute exists trace(xmlTest.hasOwnProperty('Name')); // check if the element exists

BTW, About: XML Elements vs. Attributes

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<s:Button enabled=”isDirty() && canSaveNow()” />

在build的时候遇到错误:

org.xml.sax.SAXParseException :The entity name must immediately follow the ‘&’ in the entity reference

Google了一下, XML解析的问题, 解决方法:

&& 替换为:  [&amp;&amp;]

<s:Button enabled=”isDirty() &amp;&amp; canSaveNow()” />

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