设置NumericStepper控件最大输入值。

NumericStepper 控件的 maxChars 属性学习。
示例：（右键查看源文件）

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/19/limiting-the-number-of-characters-a-user-can-type-into-a-numericstepper-controls-text-input-field-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Form  styleName ="plain" >
             < mx:FormItem  label ="maxChars:" >
                 < mx:HSlider  id ="slider"
                        minimum ="1"
                        maximum ="3"
                        snapInterval ="1"
                        tickInterval ="1"
                        liveDragging ="true"   />
             </ mx:FormItem >
         </ mx:Form >
     </ mx:ApplicationControlBar >

     < mx:NumericStepper  id ="numericStepper"
            minimum ="0"
            maximum ="10000"
            stepSize ="10"
            maxChars =" {slider.value} "   />

</ mx:Application >

最小1位数，最大3位数。

来自： http://blog.flexexamples.com/2008/05/19/limiting-the-number-of-characters-a-user-can-type-into-a-numericstepper-controls-text-input-field-in-flex/