更新一个变种，它从另一个组件得到的是它的价值 [英] Update a var, which get's it it's value from another component

问题描述

我无法与更新变种和射击的creationComplete功能吧。

I'm having trouble with updating a var and firing a function with it on creationcomplete.

在主要成分我宣布一个变种艺术家。这个VAR肯定工作，并具有一个值。我还需要一个变种在另一个组件：一个配置文件的组成部分。我能够得到的VAR有：

In the main component i declared a var artist. This var certainly works and has a value. I also need that var in another component: a profile component. I am able to get that var with:

newVar = Maincomp(this.parentApplication).artist; 

我用的是newVar在配置文件组件的API。当我启动的API函数的MouseEvent，它的工作原理。但是，我要启动的API函数的creationComplete，比VAR不起作用：它返回null。我希望让所有的参与瓦尔绑定会有所帮助，但事实并非如此。这怎么能解决吗？

I use the newVar in an API in the profile component. When i launch the API function with a mouseEvent, it works. However, i want to launch the API function on creationComplete and than the var doesn't work: it returns Null. I hoped that making all the involved vars bindable would help, but it doesn't. How can this be fixed?

额外code来说明这个问题：

Extra code to make my case clearer:

在主要排版：

        public function handleclick(cName:String):void
        {
            vName = "aVariableIGetFromAnAPI";
        }

在轮廓补偿：

                    public function zoekImages(event:FlexEvent):void
        {
            var api_URL:String = 'http://ws.audioscrobbler.com/2.0/';
            var api_imagemethod:String = 'artist.getImages';
            var api_key:String = '99f1f497c0bd598f1ec20571a38e2219';
            artistImage = DifficultierAPI(this.parentApplication).vName;
            var autocorrect:String = '1';
            var limit:String = '4'; 
            api_imagerequest = api_URL + '?method=' + api_imagemethod  + '&artist=' + artistImage + '&autocorrect=' + autocorrect + '&api_key=' + api_key + '&limit=' + limit;
            imageRequest.send(); // hier maak je connectie met lastfm
        }

这code工作，但问题是，这个code的作品，如果我把它带的MouseEvent，但不会当它需要发动对的creationComplete。或者不好，它会返回NULL，而不是值。我认为，让涉及的增值经销商可绑定将修复它，但它没有。任何帮助？

This code works, but point is that this code works if i call it with a MouseEvent, but doesn't when it needs to launch on creationcomplete. Or well, it returns Null instead of a value. I thought that making the involved vars bindable would fix it, but it doesn't. Any help?

推荐答案

如果你正在寻找变量一直从主应用程序到嵌套组件绑定，只需声明一个变量作为组件内的公共和绑定：

If you're looking to bind the variable all along from the main application to the nested component, simply declare a variable as public and bindable within your component :

主要适用

<?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" xmlns:Components="Components.*">

    <fx:Script>
        <![CDATA[
            [Bindable]
            public var myMainVar:String;

            protected function button1_clickHandler(event:MouseEvent):void
            {
                myMainVar = "Hi there!";
            }

        ]]>
    </fx:Script>

    <s:layout>
        <s:VerticalLayout/>
    </s:layout>

    <s:Button label="Click me to update the coponent's variable" click="button1_clickHandler(event)"/>

    <Components:MyCustomComponent myComponentVar="{myMainVar}"/>

</s:WindowedApplication>

嵌套组件

<?xml version="1.0" encoding="utf-8"?>
<s:Group 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]
            public var myComponentVar:String;
        ]]>
    </fx:Script>

    <s:Label text="{myComponentVar}"/>

</s:Group>

我希望这是你在找什么： - ）

I hope it is what you're looking for :-)

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