Flex:只接受数字的文本输入

查看TextInput类上的restrict属性。将其设置为“0-9”

   <s:TextInput id="textInput"
                restrict="0-9"
                widthInChars="20"
                maxChars="20" />
   <mx:TextInput id="textInput"
                restrict="0-9"
                widthInChars="20"
                maxChars="20" />

有一个叫做NumericStepper的控件。

见: http://livedocs.adobe.com/flex/3/html/help.html?content=controls_11.html

干杯 狡猾的

<?xml version="1.0"?>
<!-- Simple example to demonstrate the TextInput control. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" viewSourceURL="srcview/index.html">

    <mx:Panel title="Dodawanie dwóch liczb :)" height="279" width="238" 
        paddingTop="10" paddingLeft="10">

        <mx:TextInput id="src"
          restrict="0-9"
                maxChars="20" />
        <mx:TextInput id="dest"
          restrict="0-9"
                maxChars="20"/>

        <mx:Button label="dodaj" click= "dodaj();" id="but"/>
        <mx:Label text="Suma" width="59"/>
        <mx:Label text="0" width="160" id="wynik"/>

    </mx:Panel>
    <mx:Script>
     <![CDATA[
      import mx.formatters.NumberBase;
      public function dodaj():Number
      {
       var liczba:Number = Number(src.text) + Number(dest.text);
       wynik.text = liczba.toString();
       return 0;
      }

     ]]>
    </mx:Script>
</mx:Application>

查看mx.validators.NumberValidator: http://livedocs.adobe.com/flex/3/langref/mx/validators/NumberValidator.html

我用的是

<s:TextInput id="textInput"
    restrict="0-9.\\-"
    change="onChangeNumberTextInput(event, 6)"/>

private function onChangeNumberTextInput(event:TextOperationEvent, precision:uint = 2):void
    {
        var strNumber:String = "";
        if (event.currentTarget is mx.controls.TextInput)
            strNumber = (event.currentTarget as mx.controls.TextInput).text;
        else if (event.currentTarget is spark.components.TextInput)
            strNumber = (event.currentTarget as spark.components.TextInput).text;
        else
            return;

        var ind:int = strNumber.indexOf(".");
        if (ind > -1)
        {
            var decimal:String = strNumber.substring(ind + 1);
            if (decimal.indexOf(".") > -1)
                strNumber = strNumber.substring(0, ind + 1 + decimal.indexOf("."));
            if (decimal.length > precision)
                strNumber = strNumber.substring(0, ind + 1 + precision);
        }

        if (event.currentTarget is mx.controls.TextInput)
            (event.currentTarget as mx.controls.TextInput).text = strNumber;
        else if (event.currentTarget is spark.components.TextInput)
            (event.currentTarget as spark.components.TextInput).text = strNumber;
    }

change listener函数删除小数点或第二次出现的“.”以外的所有字符:

您需要更改属性,以便应用程序仅从应用程序请求数字键盘。

试试“软键盘”数字

我不知道你到底想做什么。如果你只想把这两个加起来,用下面的方法

{parseInt(txt1.text) + parseInt(txt2.text)}