日积月累flex小知识

1，application的三个事件的放声顺序是：initialize，creationComplete，applicationComplete

可以做个小实验来看看程序运行到发生三个事件所用的时间：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" 
    initialize="doneNow()"
    creationComplete="doneNow()"
    applicationComplete="doneNow()">
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            [Bindable]
            private var fruit:ArrayCollection=new ArrayCollection([
            {label:"fruit",price:"10"},
            {label:"tomato",price:"2o"},
            {label:"banana",price:"15"},
            {label:"orange",price:"18"}
            ]);
            
            private function doneNow():void{
                tt.text+=getTimer()+"ms"+"\n";
            }
        ]]>
    </mx:Script>
    <mx:List id="list" x="10" y="10" dataProvider="{fruit}">
    </mx:List>
    
    <mx:DataGrid x="226.5" y="10" dataProvider="{fruit}" id="dg">
        <mx:columns>
            <mx:DataGridColumn dataField="label" />
            <mx:DataGridColumn dataField="price"/>
        </mx:columns>
    </mx:DataGrid>
    <mx:Text x="481" y="13" text="" width="142" height="80" id="tt"/>
</mx:Application>

程序启动完毕后，文本框显示三个时间数据：

2511ms

2985ms

2988ms

2, 

定义了一个字符串str，用this[str]就能得到相应的对象了。 

http://cookbooks.adobe.com/post_Specifying_Embedded_Image_Data_in_XML-16317.html