如何在子窗口中使用主窗口中的数据? [英] How do I use data from the main window in a sub-window?

问题描述

我刚刚开始使用 Flex 开发照片查看器类型的桌面 AIR 应用程序.我可以从主窗口启动子窗口，但在这些子窗口中，我似乎无法访问我在主窗口中收集的数据.

I've just started working on a photo viewer type desktop AIR app with Flex. From the main window I can launch sub-windows, but in these sub-windows I can't seem to access the data I collected in the main window.

我如何访问这些数据?
或者，如何在创建时将此数据发送到子窗口?它不需要动态链接.

How can I access this data?
Or, how can I send this data to the sub-window on creation? It doesn't need to be dynamically linked.

myMain.mxml

myMain.mxml

    <?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"
                       width="260" height="200"
                       title="myMain">
    <fx:Declarations>
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            public function openWin():void {
                new myWindow().open();
            }

            public var myData:Array = new Array('The Eiffel Tower','Paris','John Doe');
        ]]>
    </fx:Script>
    <s:Button x="10" y="10" width="240" label="open a sub-window" click="openWin();"/>
</s:WindowedApplication>

myWindow.mxml

myWindow.mxml

    <?xml version="1.0" encoding="utf-8"?>
<mx:Window name="myWindow"
           title="myWindow"
           xmlns:mx="http://www.adobe.com/2006/mxml"
           layout="absolute"
           width="640" height="360">
    <mx:Script>
        <![CDATA[

        ]]>
    </mx:Script>
    <mx:Label id="comment" x="10" y="10" text=""/>
    <mx:Label id="location" x="10" y="30" text=""/>
    <mx:Label id="author" x="10" y="50" text=""/>
</mx:Window>

我意识到这可能是一个非常简单的问题，但我已经在网上搜索了几天，阅读并观看了有关随机 AIR 主题的教程，但没有找到.现在看起来像个傻瓜的风险是值得的，我想继续我的第一个应用程序！

I realize this might be a very easy question but I have searched the web, read and watched tutorials on random AIR subjects for a few days and couldn't find it. The risk of looking like a fool is worth it now, I want to get on with my first app!

推荐答案

您可以向窗口类添加属性，并从应用程序传递数据.

You could add an attribute to your window class, and pass the data from the application.

有一个属性和一个setter函数:

With an attribute and a setter function :

myWindow.mxml:

myWindow.mxml :

    <![CDATA[
        private var _data : Array;

        public function set data(data : Array) : void {
             this._data = data;
        }

    ]]>

主要

    <![CDATA[
        public function openWin():void {
            var w : myWindow = new myWindow();
            w.data = myData;
            w.open();
        }

        public var myData:Array = new Array('The Eiffel Tower',
                                            'Paris','John Doe');
    ]]>

您也可以通过向窗口添加构造函数参数来实现，但您必须在 ActionScript 中编写 Window 组件.

You could also do it by adding a constructor parameter to your window, but you will have to write your Window component in ActionScript.

(另外:您可能希望使用 MyWindow 而不是 myWindow 作为组件的名称，但这只是传统的挑剔).

(Also : you might want to use MyWindow for the name of your component instead of myWindow, but that's just conventionnal nitpicking).

另外，注意有一个单例变量 Application.application 可以被 Application 中的所有类访问；但是我不知道这是否适用于 WindowedApplication，无论哪种方式，它都不是推荐的方法.

Also, note that there is a singleton variable Application.application that is accessible to all classes in an Application ; however I don't know if this applies to a WindowedApplication, and either way it is not the recommended approach.

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