软硬度：从包含组件调用函数 [英] Flex: Call function from included component

问题描述

这是类似于我的previous张贴。但是，这一次我要调用一个函数存在主MXML页面上。

This is similar to my previous posting. But this time I want to call a function that exists on the main mxml page.

这是我的主MXML页：

This is my main mxml page:

main.mxml

main.mxml

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:ns1="*">
    <mx:Script>
    	<![CDATA[	
    	public function changeText(currentText:String):void{

    		switch (currentText){
    			case "changeText":
    				lblOne.text = "More Text";					
    		}
    	}
    		]]>
    </mx:Script>

    <mx:HBox x="137.5" y="10" width="100%" height="100%">
    	<ns1:menu id="buttons"> </ns1:menu>
    </mx:HBox>
    <mx:Canvas x="137" y="88" width="408.5" height="200">
    	<mx:HBox x="0" y="10" width="388.5" height="190">
    		<mx:Panel width="388" height="179" layout="absolute">
    			<mx:Label x="10" y="10" text="Some Text" visible="{buttons.showLabel}" id="lblOne"/>
    		</mx:Panel>
    	</mx:HBox>
    </mx:Canvas>
</mx:Application>

下面是我的网页包含：

menu.mxml

menu.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300">
    <mx:Script>
    	<![CDATA[
    	    [Bindable] public var showLabel:Boolean = true;
    	]]>
    </mx:Script>
    <mx:MenuBar width="380" height="58"></mx:MenuBar>
    <mx:Button x="10" y="10" width="80" label="Show" id="btnOne" click="this.showLabel=true;" />
    <mx:Button x="94" y="10" width="80" label="Hide" id="btnTwo" click="this.showLabel=false;"/>
    <mx:Button x="181" y="10" width="80" label="Run Function" id="btnThree" click="{changeText('changeText')}"/>
</mx:Canvas>

我如何呼吁menu.mxml从按钮的changeText功能？

How do I call the changeText function from the button on menu.mxml?

推荐答案

这添加到菜单：

  <mx:Metadata>
         [Event(name="buttonClicked", type="flash.events.Event")]
    </mx:Metadata>

 <mx:Button x="10" y="10" width="80" label="Show" id="btnOne" click="this.showLabel=true;dispatchEvent(new Event("buttonClicked"));"/>

改变主要为：

Change main to:

  <ns1:menu id="buttons" buttonClicked="changeText("Your Text");">

我不知道在哪里目前的案文是来自，但如果是从菜单中，您可能需要建立自己的自定义Flex事件或为两部分的访问创建一个公共变量。首先是通常preferred。

I couldn't tell where current text is coming from but if it is from menu you may have to build your own custom flex event or create a common variable for the two parts to access. The first is usually preferred.

P.S。本次活动的元数据的事情也可以通过添加事件侦听器创建应用程序完成后实现。你会添加到主：

P.S. The event metadata thing could also be achieved by adding the event listener when the creation of the application completes. You would add to main:

buttons.addEventListener("buttonClicked",changeText("Your Text"));

这篇关于软硬度：从包含组件调用函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！