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	<title>中文Flex例子 &#187; numLines</title>
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	<description>中文Adobe Flex例子,Flex实例教程,RIA资源,全文检索技术,算法和数据结构</description>
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		<title>Flex中如何利用getTextField事件和numLines属性，计算出TextArea控件中内容的行数的例子</title>
		<link>http://blog.minidx.com/2008/05/09/834.html</link>
		<comments>http://blog.minidx.com/2008/05/09/834.html#comments</comments>
		<pubDate>Fri, 09 May 2008 11:18:08 +0000</pubDate>
		<dc:creator>Minidxer</dc:creator>
				<category><![CDATA[Flex]]></category>
		<category><![CDATA[getTextField]]></category>
		<category><![CDATA[mx_internal]]></category>
		<category><![CDATA[numLines]]></category>
		<category><![CDATA[TextArea]]></category>

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		<description><![CDATA[关于Flex的TextArea控件的例子，前面已经介绍了不少，包括设置该控件文本无效时的颜色，如何利用setSelection事件设定文本选中范围，如何利用htmlText属性以及condenseWhite属性紧缩HTML空格&#8230;&#8230;等等，可以直接点TextArea Tag查看&#8211;WordPress的Tag功能，其实是非常不错。
接下来的例子，演示了Flex中如何利用getTextField事件和numLines属性，计算出TextArea控件中内容的行数。
让我们先来看一下Demo（可以右键View Source或点击这里察看源代码）：









下面是完整代码(或点击这里查看)：
Download: main.mxml&#60;?xml version=&#34;1.0&#34; encoding=&#34;utf-8&#34;?&#62;
&#60;mx:Application&#160;xmlns:mx=&#34;http://www.adobe.com/2006/mxml&#34;
&#160; &#160; &#160; &#160; layout=&#34;vertical&#34;
&#160; &#160; &#160; &#160; verticalAlign=&#34;middle&#34;
&#160; &#160; &#160; &#160; backgroundColor=&#34;white&#34;&#62;
&#160;
&#160; &#160; &#60;mx:Script&#62;
&#160; &#160; &#160; &#160; &#60;![CDATA[
&#160; &#160; &#160; &#160; &#160; &#160; import mx.utils.StringUtil;
&#160;
&#160; &#160; &#160; &#160; &#160; &#160; private function textArea_change(evt:Event):void {
&#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; callLater(updateStats, [evt]);
&#160; &#160; &#160; &#160; &#160; &#160; }
&#160;
&#160; [...]]]></description>
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