好的,我的智慧结束了。我是一个菜鸟,我明白了,自从我以任何诚意完成编程以来,已经有一段时间了。也就是说,我正试图重新回到它并且左右碰到问题。
我最大的问题与分配变量有关。作为一个侧面项目,我正在尝试使用FlashBuilder创建一个简单的计算器。我知道它没有完成,它可能有多个问题。所以任何帮助都非常感谢!
到目前为止,这是我的代码。什么。上午。 I.失踪???
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
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.events.FlexEvent;
import spark.components.FormItem
import spark.components.TextArea;
import spark.components.TextInput;
public var n_1:Number
public var n_2:Number
public var ttl:Number = 0
protected function added():void
{
ttl = n1 + n2;
total.text = String(ttl);
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:Form id="Calc" x="28" y="27">
<s:FormItem id="n1" label="1st #">
<s:TextInput prompt="Number"/>
</s:FormItem>
<s:FormItem id="n2" label="2nd#">
<s:TextInput prompt="Number"/>
</s:FormItem>
<s:FormItem label="Total=">
<s:Label id="total"/>
</s:FormItem>
</s:Form>
<s:Button id="add_bn" x="377" y="83" label="+" click="added()"/>
<s:Button id="minus_bn" x="377" y="123" label="-"/>
</s:Application>
答案 0 :(得分:0)
您正在使用其他表单项添加表单项,因此不会收到数字(NaN
)。
您需要的是TextInput
文本值Number
。
您也可以使用数据绑定,但要使用您的示例:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
minWidth="955"
minHeight="600">
<fx:Script>
<![CDATA[
import spark.components.FormItem;
import spark.components.TextInput;
public var n_1:Number;
public var n_2:Number;
public var ttl:Number = 0;
protected function add_bn_clickHandler(event:MouseEvent):void
{
// get numbers from text field
n_1 = Number(n1.text);
n_2 = Number(n2.text);
// total:
ttl = n_1 + n_2;
total.text = ttl.toString();
}
protected function minus_bn_clickHandler(event:MouseEvent):void
{
// get numbers from text field
n_1 = Number(n1.text);
n_2 = Number(n2.text);
// total:
ttl = n_1 - n_2;
total.text = ttl.toString();
}
]]>
</fx:Script>
<s:Form id="Calc"
x="28"
y="27">
<s:FormItem label="1st #">
<s:TextInput id="n1"
prompt="Number" />
</s:FormItem>
<s:FormItem label="2nd#">
<s:TextInput id="n2"
prompt="Number" />
</s:FormItem>
<s:FormItem label="Total=">
<s:Label id="total" />
</s:FormItem>
</s:Form>
<s:Button id="add_bn"
x="377"
y="83"
label="+"
click="add_bn_clickHandler(event)" />
<s:Button id="minus_bn"
x="377"
y="123"
label="-"
click="minus_bn_clickHandler(event)" />
</s:Application>