Flex4 杂记

1、String 转换为 ArrayCollection对象数组

（应用实例：获取到String类型年份，转换为对象数组 应用到下拉框）

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" creationComplete="application1_creationCompleteHandler(event)"
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx"  minWidth="955" minHeight="600">
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.events.FlexEvent;
			
			[Bindable]
			private var list:ArrayCollection=new ArrayCollection();
			protected function application1_creationCompleteHandler(event:FlexEvent):void{
				var str:String="1998,1999";
				for each(var s:String in str.split(',')){
					list.addItem({'year': s});
					var arr:ArrayCollection = list;
				}
			}
		]]>
	</fx:Script>
	<s:DropDownList id="ddl" width="150" dataProvider="{list}" labelField="year"/>
</s:Application>

 2、Flex中Array 插入元素：

         var array:Array = new Array();

       array.push("aaa");  //数组尾端追加

 

3、Flex中 ArrayCollection 插入元素：

       要插入元素，可使用addItemAt和addItem： 

      var  arrColl:ArrayCollection = new ArrayCollection();

   arrColl.addItemAt({name:"张三", age:40}, 0);

   ArrColl.addItem({name:"李四", age:40});

 

4、Flex中获取屏幕分辨率：

   Capabilities.screenResolutionX

   Capabilities.screenResolutionY

 

5、Flex获取当前窗口的高度和宽度：

      得到当前窗口的高度：this.height;

      得到当前窗口的宽度：this.width;