s:WindowedApplication为空,不初始化/显示子组件

时间:2011-07-05 20:45:13

标签: flex air

我对Flex有很多经验,我刚刚开始编写我的第一个AIR应用程序,并希望尽可能多地使用Spark。

所以我开始使用一个简单的Hello World应用程序:

<?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" backgroundColor="red"
                       initialize="initializeHandler(event)">

  <s:Label text="Hello World"/>

  <s:Button label="Test" initialize="onButtonInitialize()"/>

  <fx:Script><![CDATA[
    import mx.events.FlexEvent;

    private function onButtonInitialize():void
    {
      trace("Button");
    }


    private function initializeHandler(event:FlexEvent):void
    {
      trace("Application");
    }
    ]]></fx:Script>
</s:WindowedApplication>

不幸的是,这个简单的示例显示没有子组件,甚至没有触发初始化处理程序。但是,只要我将根标记更改为mx:WindowedApplication,一切都按预期运行:显示标签和按钮,控制台显示两个跟踪语句的输出。

我错过了什么?

我正在使用Flex 4.5.0并使用flex-mojos进行构建。

1 个答案:

答案 0 :(得分:2)

我猜你的描述符文件是关闭的。这是Flash Builder为我创建的默认值:

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<application xmlns="http://ns.adobe.com/air/application/2.6">

<!-- Adobe AIR Application Descriptor File Template.

    Specifies parameters for identifying, installing, and launching AIR applications.

    xmlns - The Adobe AIR namespace: http://ns.adobe.com/air/application/2.6
            The last segment of the namespace specifies the version 
            of the AIR runtime required for this application to run.

    minimumPatchLevel - The minimum patch level of the AIR runtime required to run 
            the application. Optional.
-->

    <!-- A universally unique application identifier. Must be unique across all AIR applications.
    Using a reverse DNS-style name as the id is recommended. (Eg. com.example.ExampleApplication.) Required. -->
    <id>Airtest</id>

    <!-- Used as the filename for the application. Required. -->
    <filename>Airtest</filename>

    <!-- The name that is displayed in the AIR application installer. 
    May have multiple values for each language. See samples or xsd schema file. Optional. -->
    <name>Airtest</name>

    <!-- A string value of the format <0-999>.<0-999>.<0-999> that represents application version which can be used to check for application upgrade. 
    Values can also be 1-part or 2-part. It is not necessary to have a 3-part value.
    An updated version of application must have a versionNumber value higher than the previous version. Required for namespace >= 2.5 . -->
    <versionNumber>0.0.0</versionNumber>

    <!-- A string value (such as "v1", "2.5", or "Alpha 1") that represents the version of the application, as it should be shown to users. Optional. -->
    <!-- <versionLabel></versionLabel> -->

    <!-- Description, displayed in the AIR application installer.
    May have multiple values for each language. See samples or xsd schema file. Optional. -->
    <!-- <description></description> -->

    <!-- Copyright information. Optional -->
    <!-- <copyright></copyright> -->

    <!-- Publisher ID. Used if you're updating an application created prior to 1.5.3 -->
    <!-- <publisherID></publisherID> -->

    <!-- Settings for the application's initial window. Required. -->
    <initialWindow>
        <!-- The main SWF or HTML file of the application. Required. -->
        <!-- Note: In Flash Builder, the SWF reference is set automatically. -->
        <content>[This value will be overwritten by Flash Builder in the output app.xml]</content>

        <!-- The title of the main window. Optional. -->
        <!-- <title></title> -->

        <!-- The type of system chrome to use (either "standard" or "none"). Optional. Default standard. -->
        <!-- <systemChrome></systemChrome> -->

        <!-- Whether the window is transparent. Only applicable when systemChrome is none. Optional. Default false. -->
        <!-- <transparent></transparent> -->

        <!-- Whether the window is initially visible. Optional. Default false. -->
        <!-- <visible></visible> -->

        <!-- Whether the user can minimize the window. Optional. Default true. -->
        <!-- <minimizable></minimizable> -->

        <!-- Whether the user can maximize the window. Optional. Default true. -->
        <!-- <maximizable></maximizable> -->

        <!-- Whether the user can resize the window. Optional. Default true. -->
        <!-- <resizable></resizable> -->

        <!-- The window's initial width in pixels. Optional. -->
        <!-- <width></width> -->

        <!-- The window's initial height in pixels. Optional. -->
        <!-- <height></height> -->

        <!-- The window's initial x position. Optional. -->
        <!-- <x></x> -->

        <!-- The window's initial y position. Optional. -->
        <!-- <y></y> -->

        <!-- The window's minimum size, specified as a width/height pair in pixels, such as "400 200". Optional. -->
        <!-- <minSize></minSize> -->

        <!-- The window's initial maximum size, specified as a width/height pair in pixels, such as "1600 1200". Optional. -->
        <!-- <maxSize></maxSize> -->

        <!-- The initial aspect ratio of the app when launched (either "portrait" or "landscape"). Optional. Mobile only. Default is the natural orientation of the device -->

        <!-- <aspectRatio></aspectRatio> -->

        <!-- Whether the app will begin auto-orienting on launch. Optional. Mobile only. Default false -->

        <!-- <autoOrients></autoOrients> -->

        <!-- Whether the app launches in full screen. Optional. Mobile only. Default false -->

        <!-- <fullScreen></fullScreen> -->

        <!-- The render mode for the app (either auto, cpu, or gpu). Optional. Mobile only. Default auto -->

        <!-- <renderMode></renderMode> -->

        <!-- Whether or not to pan when a soft keyboard is raised or lowered (either "pan" or "none").  Optional.  Defaults "pan." -->
        <!-- <softKeyboardBehavior></softKeyboardBehavior> -->
    <autoOrients>false</autoOrients>
        <fullScreen>false</fullScreen>
        <visible>false</visible>
    </initialWindow>

    <!-- We recommend omitting the supportedProfiles element, -->
    <!-- which in turn permits your application to be deployed to all -->
    <!-- devices supported by AIR. If you wish to restrict deployment -->
    <!-- (i.e., to only mobile devices) then add this element and list -->
    <!-- only the profiles which your application does support. -->
    <!-- <supportedProfiles>desktop extendedDesktop mobileDevice extendedMobileDevice</supportedProfiles> -->

    <!-- The subpath of the standard default installation location to use. Optional. -->
    <!-- <installFolder></installFolder> -->

    <!-- The subpath of the Programs menu to use. (Ignored on operating systems without a Programs menu.) Optional. -->
    <!-- <programMenuFolder></programMenuFolder> -->

    <!-- The icon the system uses for the application. For at least one resolution,
    specify the path to a PNG file included in the AIR package. Optional. -->
    <!-- <icon>
        <image16x16></image16x16>
        <image32x32></image32x32>
        <image36x36></image36x36>
        <image48x48></image48x48>
        <image72x72></image72x72>
        <image114x114></image114x114>
        <image128x128></image128x128>
    </icon> -->

    <!-- Whether the application handles the update when a user double-clicks an update version
    of the AIR file (true), or the default AIR application installer handles the update (false).
    Optional. Default false. -->
    <!-- <customUpdateUI></customUpdateUI> -->

    <!-- Whether the application can be launched when the user clicks a link in a web browser.
    Optional. Default false. -->
    <!-- <allowBrowserInvocation></allowBrowserInvocation> -->

    <!-- Listing of file types for which the application can register. Optional. -->
    <!-- <fileTypes> -->

        <!-- Defines one file type. Optional. -->
        <!-- <fileType> -->

            <!-- The name that the system displays for the registered file type. Required. -->
            <!-- <name></name> -->

            <!-- The extension to register. Required. -->
            <!-- <extension></extension> -->

            <!-- The description of the file type. Optional. -->
            <!-- <description></description> -->

            <!-- The MIME content type. -->
            <!-- <contentType></contentType> -->

            <!-- The icon to display for the file type. Optional. -->
            <!-- <icon>
                <image16x16></image16x16>
                <image32x32></image32x32>
                <image48x48></image48x48>
                <image128x128></image128x128>
            </icon> -->

        <!-- </fileType> -->
    <!-- </fileTypes> -->

    <!-- iOS specific capabilities -->
    <!-- <iPhone> -->
        <!-- A list of plist key/value pairs to be added to the application Info.plist -->
        <!-- <InfoAdditions>
            <![CDATA[
                <key>UIDeviceFamily</key>
                <array>
                    <string>1</string>
                    <string>2</string>
                </array>
                <key>UIStatusBarStyle</key>
                <string>UIStatusBarStyleBlackOpaque</string>
                <key>UIRequiresPersistentWiFi</key>
                <string>YES</string>
            ]]>
        </InfoAdditions> -->
        <!-- <requestedDisplayResolution></requestedDisplayResolution> -->
    <!-- </iPhone> -->

    <!-- Specify Android specific tags that get passed to AndroidManifest.xml file. -->
    <!--<android> 
        <manifestAdditions>
        <![CDATA[
            <manifest android:installLocation="auto">
                <uses-permission android:name="android.permission.INTERNET"/>
                <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
                <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
                <uses-configuration android:reqFiveWayNav="true"/>
                <supports-screens android:normalScreens="true"/>
                <uses-feature android:required="true" android:name="android.hardware.touchscreen.multitouch"/>
                <application android:enabled="true">
                    <activity android:excludeFromRecents="false">
                        <intent-filter>
                            <action android:name="android.intent.action.MAIN"/>
                            <category android:name="android.intent.category.LAUNCHER"/>
                        </intent-filter>
                    </activity>
                </application>
            </manifest>
        ]]>
        </manifestAdditions> 
    </android> -->
    <!-- End of the schema for adding the android specific tags in AndroidManifest.xml file -->

</application>