软硬度:更新标签的文本,至极是一个变量 [英] Flex: Update a label's text, wich is a variable
问题描述
我有得到它是从一个VAR值,当你点击一个按钮的标签。该变种已经宣布:
I have a label that get it's value from a var when you click on a button. The var has already been declared:
public function clickevent
{
label.text = aVariable;
}
现在我知道,如果我有一个标签,像这样的:
Now I know that if i have a label like this:
<s:Label id="label2" text="{aVariable}"/>
和aVariable是空的,LABEL2的文本是空(它不给一个错误,只是空,在我的情况)。这是我目前的状况。
and aVariable is empty, label2's text is Null (it doesn't give an error, just "Null" in my situation). This is my current situation.
我想知道的是,当我后来就aVariable的值更改为一个字符串hasChanged为例。该LABEL2的文本也应更改为hasChanged,而无需按下一个按钮或任何东西,使这个更改的用户。如何才能做到这一点?
What I'd like to know is when I later on change the aVariable's value to a string "hasChanged", for example. The label2's text should also change to "hasChanged" without the user having to push a button or anything to make this change. How can this be done?
推荐答案
我不是100%肯定我明白你的问题,但如果你的变量声明为绑定,不管你的脚本改变其价值或按钮,标签的文本propertie将遵循因为它是绑定。
I'm not 100% sure I understand your question but if your variable is declared as "bindable", no matter if your script change its value or a button, your text propertie of the label will follow as it is binded.
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Script>
<![CDATA[
[Bindable]
private var aVariable:String;
protected function button1_clickHandler(event:MouseEvent):void
{
aVariable = "My new value";
}
]]>
</fx:Script>
<s:layout>
<s:VerticalLayout/>
</s:layout>
<s:Label text="{aVariable}"/>
<s:Button label="Click me" click="button1_clickHandler(event)"/>
</s:WindowedApplication>
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