適用於 Adobe® Flash® Platform 的 ActionScript® 3.0 參考
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Flex 4.6 和更早版本, Flash Pro CS6 和更早版本
隱藏篩選
flash.accessibility 

Accessibility  - AS3

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adobe.utils
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com.adobe.acm.solutions.authoring.domain.extensions
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com.adobe.consulting.pst.vo
com.adobe.dct.component
com.adobe.dct.component.datadictionary
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com.adobe.dct.exp
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com.adobe.dct.service.provider
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com.adobe.dct.util
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com.adobe.ep.taskmanagement.domain
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com.adobe.ep.taskmanagement.util
com.adobe.ep.ux.attachmentlist.component
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com.adobe.exm.expression
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com.adobe.fiber.runtime.lib
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com.adobe.guides.spark.util
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com.adobe.icc.dc.domain
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com.adobe.icc.editors.model
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com.adobe.icomm.assetplacement.controller
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com.adobe.icomm.assetplacement.data
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com.adobe.livecycle.assetmanager.client
com.adobe.livecycle.assetmanager.client.event
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com.adobe.livecycle.assetmanager.client.model
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com.adobe.livecycle.assetmanager.client.service
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com.adobe.livecycle.rca.model
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com.adobe.livecycle.rca.model.document
com.adobe.livecycle.rca.model.participant
com.adobe.livecycle.rca.model.reminder
com.adobe.livecycle.rca.model.stage
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com.adobe.livecycle.rca.service.core
com.adobe.livecycle.rca.service.core.delegate
com.adobe.livecycle.rca.service.process
com.adobe.livecycle.rca.service.process.delegate
com.adobe.livecycle.rca.token
com.adobe.livecycle.ria.security.api
com.adobe.livecycle.ria.security.service
com.adobe.mosaic.layouts
com.adobe.mosaic.layouts.dragAndDrop
com.adobe.mosaic.layouts.interfaces
com.adobe.mosaic.mxml
com.adobe.mosaic.om.constants
com.adobe.mosaic.om.events
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com.adobe.mosaic.skinning
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com.adobe.mosaic.sparklib.text
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com.adobe.solutions.acm.authoring.presentation
com.adobe.solutions.acm.authoring.presentation.actionbar
com.adobe.solutions.acm.authoring.presentation.common
com.adobe.solutions.acm.authoring.presentation.events
com.adobe.solutions.acm.authoring.presentation.fragment
com.adobe.solutions.acm.authoring.presentation.letter
com.adobe.solutions.acm.authoring.presentation.letter.data
com.adobe.solutions.acm.authoring.presentation.preview
com.adobe.solutions.acm.authoring.presentation.rte
com.adobe.solutions.acm.ccr.presentation
com.adobe.solutions.acm.ccr.presentation.contentcapture
com.adobe.solutions.acm.ccr.presentation.contentcapture.events
com.adobe.solutions.acm.ccr.presentation.contentcapture.preview
com.adobe.solutions.acm.ccr.presentation.datacapture
com.adobe.solutions.acm.ccr.presentation.datacapture.renderers
com.adobe.solutions.acm.ccr.presentation.pdf
com.adobe.solutions.exm
com.adobe.solutions.exm.authoring
com.adobe.solutions.exm.authoring.components.controls
com.adobe.solutions.exm.authoring.components.toolbars
com.adobe.solutions.exm.authoring.domain
com.adobe.solutions.exm.authoring.domain.expression
com.adobe.solutions.exm.authoring.domain.impl
com.adobe.solutions.exm.authoring.domain.method
com.adobe.solutions.exm.authoring.domain.variable
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com.adobe.solutions.exm.authoring.events
com.adobe.solutions.exm.authoring.model
com.adobe.solutions.exm.authoring.renderer
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com.adobe.solutions.exm.expression
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com.adobe.solutions.exm.method
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com.adobe.solutions.exm.mock.method
com.adobe.solutions.exm.runtime
com.adobe.solutions.exm.runtime.impl
com.adobe.solutions.exm.variable
com.adobe.solutions.prm.constant
com.adobe.solutions.prm.domain
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com.adobe.solutions.prm.domain.impl
com.adobe.solutions.prm.domain.manager
com.adobe.solutions.prm.presentation.asset
com.adobe.solutions.prm.presentation.constant
com.adobe.solutions.prm.presentation.document
com.adobe.solutions.prm.presentation.event
com.adobe.solutions.prm.presentation.file
com.adobe.solutions.prm.presentation.project
com.adobe.solutions.prm.presentation.team
com.adobe.solutions.prm.presentation.util
com.adobe.solutions.prm.service
com.adobe.solutions.prm.services.impl
com.adobe.solutions.prm.vo
com.adobe.solutions.rca.constant
com.adobe.solutions.rca.domain
com.adobe.solutions.rca.domain.common
com.adobe.solutions.rca.domain.factory
com.adobe.solutions.rca.domain.impl
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com.adobe.solutions.rca.presentation
com.adobe.solutions.rca.presentation.comment
com.adobe.solutions.rca.presentation.constant
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com.adobe.solutions.rca.presentation.gantt
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com.adobe.solutions.rca.presentation.template
com.adobe.solutions.rca.presentation.template.audit
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com.adobe.solutions.rca.services.impl
com.adobe.solutions.rca.vo
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com.adobe.viewsource
fl.accessibility
fl.containers
fl.controls
fl.controls.dataGridClasses
fl.controls.listClasses
fl.controls.progressBarClasses
fl.core
fl.data
fl.display
fl.events
fl.ik
fl.lang
fl.livepreview
fl.managers
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fl.rsl
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fl.transitions
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fl.video
flash.accessibility
flash.concurrent
flash.crypto
flash.data
flash.desktop
flash.display
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flash.errors
flash.events
flash.external
flash.filesystem
flash.filters
flash.geom
flash.globalization
flash.html
flash.media
flash.net
flash.net.dns
flash.net.drm
flash.notifications
flash.permissions
flash.printing
flash.profiler
flash.sampler
flash.security
flash.sensors
flash.system
flash.text
flash.text.engine
flash.text.ime
flash.ui
flash.utils
flash.xml
flashx.textLayout
flashx.textLayout.compose
flashx.textLayout.container
flashx.textLayout.conversion
flashx.textLayout.edit
flashx.textLayout.elements
flashx.textLayout.events
flashx.textLayout.factory
flashx.textLayout.formats
flashx.textLayout.operations
flashx.textLayout.utils
flashx.undo
ga.controls
ga.layouts
ga.model
ga.uiComponents
ga.util
ga.views
ga.wrappers
lc.foundation
lc.foundation.domain
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lc.foundation.ui
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lc.preloader
lc.procmgmt
lc.procmgmt.commands
lc.procmgmt.domain
lc.procmgmt.events
lc.procmgmt.formbridge
lc.procmgmt.impl
lc.procmgmt.ui.attachments
lc.procmgmt.ui.controls
lc.procmgmt.ui.controls.card
lc.procmgmt.ui.controls.renderer
lc.procmgmt.ui.help
lc.procmgmt.ui.layout
lc.procmgmt.ui.presentationmodel
lc.procmgmt.ui.process
lc.procmgmt.ui.search
lc.procmgmt.ui.startpoint
lc.procmgmt.ui.task
lc.procmgmt.ui.task.form
lc.procmgmt.ui.task.form.commands
lc.procmgmt.ui.tracking
mx.accessibility
mx.automation
mx.automation.air
mx.automation.delegates
mx.automation.delegates.advancedDataGrid
mx.automation.delegates.charts
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mx.automation.delegates.controls.fileSystemClasses
mx.automation.delegates.core
mx.automation.delegates.flashflexkit
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mx.binding
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mx.charts
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mx.charts.effects
mx.charts.effects.effectClasses
mx.charts.events
mx.charts.renderers
mx.charts.series
mx.charts.series.items
mx.charts.series.renderData
mx.charts.styles
mx.collections
mx.collections.errors
mx.containers
mx.containers.accordionClasses
mx.containers.dividedBoxClasses
mx.containers.errors
mx.containers.utilityClasses
mx.controls
mx.controls.advancedDataGridClasses
mx.controls.dataGridClasses
mx.controls.listClasses
mx.controls.menuClasses
mx.controls.olapDataGridClasses
mx.controls.scrollClasses
mx.controls.sliderClasses
mx.controls.textClasses
mx.controls.treeClasses
mx.controls.videoClasses
mx.core
mx.core.windowClasses
mx.data
mx.data.crypto
mx.data.errors
mx.data.events
mx.data.messages
mx.data.mxml
mx.data.offline.errors
mx.data.utils
mx.effects
mx.effects.easing
mx.effects.effectClasses
mx.events
mx.filters
mx.flash
mx.formatters
mx.geom
mx.graphics
mx.graphics.codec
mx.graphics.shaderClasses
mx.logging
mx.logging.errors
mx.logging.targets
mx.managers
mx.messaging
mx.messaging.channels
mx.messaging.config
mx.messaging.errors
mx.messaging.events
mx.messaging.management
mx.messaging.messages
mx.modules
mx.netmon
mx.olap
mx.olap.aggregators
mx.preloaders
mx.printing
mx.resources
mx.rpc
mx.rpc.events
mx.rpc.http
mx.rpc.http.mxml
mx.rpc.livecycle
mx.rpc.mxml
mx.rpc.remoting
mx.rpc.remoting.mxml
mx.rpc.soap
mx.rpc.soap.mxml
mx.rpc.wsdl
mx.rpc.xml
mx.skins
mx.skins.halo
mx.skins.spark
mx.skins.wireframe
mx.skins.wireframe.windowChrome
mx.states
mx.styles
mx.utils
mx.validators
org.osmf.containers
org.osmf.display
org.osmf.elements
org.osmf.events
org.osmf.layout
org.osmf.logging
org.osmf.media
org.osmf.metadata
org.osmf.net
org.osmf.net.dvr
org.osmf.net.httpstreaming
org.osmf.net.metrics
org.osmf.net.qos
org.osmf.net.rtmpstreaming
org.osmf.net.rules
org.osmf.traits
org.osmf.utils
spark.accessibility
spark.automation.delegates
spark.automation.delegates.components
spark.automation.delegates.components.gridClasses
spark.automation.delegates.components.mediaClasses
spark.automation.delegates.components.supportClasses
spark.automation.delegates.skins.spark
spark.automation.events
spark.collections
spark.components
spark.components.calendarClasses
spark.components.gridClasses
spark.components.mediaClasses
spark.components.supportClasses
spark.components.windowClasses
spark.core
spark.effects
spark.effects.animation
spark.effects.easing
spark.effects.interpolation
spark.effects.supportClasses
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spark.formatters.supportClasses
spark.globalization
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spark.layouts
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spark.managers
spark.modules
spark.preloaders
spark.primitives
spark.primitives.supportClasses
spark.skins
spark.skins.mobile
spark.skins.mobile.supportClasses
spark.skins.spark
spark.skins.spark.mediaClasses.fullScreen
spark.skins.spark.mediaClasses.normal
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spark.skins.wireframe
spark.skins.wireframe.mediaClasses
spark.skins.wireframe.mediaClasses.fullScreen
spark.transitions
spark.utils
spark.validators
spark.validators.supportClasses
xd.core.axm.enterprise.view.components
xd.core.axm.enterprise.view.skins
xd.core.axm.view.components
xd.core.axm.view.components.support

語言元素

全域常數
全域函數
運算子
陳述式、關鍵字和指令
特殊類型

附錄

新增內容
編譯器錯誤
編譯器警告
執行階段錯誤
移轉至 ActionScript 3
支援的字元集
僅限 MXML 標籤
移動 XML 元素
Timed Text 標籤
不建議元素清單
AccessibilityImplementation 常數
如何使用 ActionScript 範例
法律聲明
套件flash.accessibility
類別public final class Accessibility
繼承Accessibility Inheritance Object

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9

Accessibility 類別會管理與螢幕朗讀程式之間的通訊。 螢幕朗讀程式是一種輔助性技術類型,提供螢幕內容的聲音版本給視障使用者使用。 Accessibility 類別的方法會是靜態的,也就是說,您不必建立類別的實體就可以使用其方法。

行動裝置瀏覽器支援:行動裝置瀏覽器不支援此類別。

AIR 描述檔支援:所有桌上型電腦作業系統都支援此項功能,但行動裝置或 AIR for TV 裝置不支援。如需有關跨多個描述檔之 API 支援的詳細資訊,請參閱 AIR 描述檔支援

若要取得某個特定物件 (例如按鈕、影片片段或文字欄位) 的輔助屬性並為其進行設定,請使用 DisplayObject.accessibilityProperties 屬性。 若要判斷播放程式或執行階段是否正在支援輔助功能工具的環境中執行,請使用 Capabilities.hasAccessibility 屬性。

注意:AIR 2 支援 JAWS 11 (或更新的版本) 螢幕朗讀程式軟體。如需詳細資訊,請參閱 http://www.adobe.com/accessibility/。

檢視範例

詳細資訊

相關 API 元素



公用屬性
 屬性定義自
  active : Boolean
[靜態] [唯讀] 指出螢幕朗讀程式目前是否為作用中,且應用程式正在與其進行通訊。
Accessibility
 Inheritedconstructor : Object
類別物件的參照或是特定物件實體的建構函數。
Object
公用方法
 方法定義自
 Inherited
指出物件是否有已定義的指定屬性。
Object
 Inherited
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。
Object
 Inherited
指出指定的屬性是否存在,以及是否可列舉。
Object
 Inherited
為迴圈作業設定動態屬性的可用性。
Object
 Inherited
傳回代表此物件的字串,根據地區特定慣例進行格式化。
Object
 Inherited
會傳回指定之物件的字串形式。
Object
  
[靜態] 告知 Flash Player 套用任何使用 DisplayObject.accessibilityProperties 屬性所做的輔助功能變更。
Accessibility
 Inherited
會傳回指定之物件的基本值。
Object
屬性詳細資訊

active

屬性
active:Boolean  [唯讀]

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9

指出螢幕朗讀程式目前是否為作用中,且應用程式正在與其進行通訊。如果您希望應用程式在螢幕讀取程式中的行為方式不同,請使用這個方法。

將此屬性設定成 true 後,該屬性在應用程式執行期間會保持為 true。(很少使用者會在啟動螢幕朗讀程式之後再加以關閉)。

注意:呼叫此方法之前,請在啟動 AIR 應用程式之後,或者在文件播放處的 Flash® Player 視窗第一次出現之後,等候 1、2 秒鐘的時間。否則,即使目前有一個作用中的輔助功能用戶端,您還是可能會收到 false 的傳回值。因為受輔助功能用戶端與 Flash Player 或 AIR 之間存在的非同步通訊機制所影響,所以會發生這種狀況。

若要判斷播放程式是否正在支援螢幕朗讀程式的環境中執行,請使用 Capabilities.hasAccessibility 屬性。



實作
    public static function get active():Boolean

相關 API 元素

方法詳細資訊

updateProperties

()方法
public static function updateProperties():void

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9

告知 Flash Player 套用任何使用 DisplayObject.accessibilityProperties 屬性所做的輔助功能變更。 您必須呼叫此方法,才能使變更生效。

如果您修改了多個物件的輔助功能屬性,只需要呼叫 Accessibility.updateProperties() 方法一次即可;多次呼叫可能導致效能降低,以及錯誤的螢幕朗讀程式輸出。


擲回值
IllegalOperationError — 這個版本的 Flash Player 不支援輔助功能。 如果 flash.system.Capabilities.hasAccessibility 屬性為 false,請勿呼叫 Accessibility.updateProperties() 方法。

相關 API 元素

AccessibilityExample.as

下列範例使用 AccessibilityExampleCustomAccessibleButtonCustomSimpleButtonButtonDisplayState 樣本類別來建立與輔助功能相容的選單,以便與一般螢幕朗讀程式搭配運作。 這個範例會執行下列工作:
  1. 它會追蹤 Accessibility.active 屬性,判斷螢幕朗讀程式目前是否為作用中,以及播放程式是否正在和此程式進行通訊。
  2. 如果 active 屬性傳回 true,此範例會呼叫 updateProperties() 方法來套用範例中對按鈕所做的輔助功能變更。
  3. 此範例會呼叫 flash.utils.setTimeout() 方法,以指定 updateAccessibility() 在 2 秒後呼叫關閉方法。

注意:在檢查 Accessibility.active 之前呼叫 setTimeout(),讓 Flash Player 有兩秒鐘能用來連接至可用的螢幕朗讀程式。 * 如果您沒有提供足夠的延遲時間,則 setTimeout 呼叫可能會傳回 false,就算有可用的螢幕朗讀程式也是一樣。

下列範例只會在呼叫 Accessibility.active 傳回 true 時處理 Accessibility.updateProperties() 方法,這情形只有在 Flash Player 目前正連接至作用中的螢幕朗讀程式時才會發生。 如果 updateProperties 是在沒有作用中的螢幕朗讀程式的情形下被呼叫,則會擲出 IllegalOperationError 例外。

package {
    import flash.display.Sprite;
    import flash.accessibility.Accessibility;
    import flash.utils.setTimeout;
    
    public class AccessibilityExample extends Sprite {
        public static const BUTTON_WIDTH:uint = 90;
        public static const BUTTON_HEIGHT:uint = 20;
        
        private var gutter:uint = 5;
        private var menuLabels:Array = new Array("PROJECTS", "PORTFOLIO", "CONTACT");
        private var menuDescriptions:Array = new Array("Learn more about our projects"
                                                     , "See our portfolio"
                                                     , "Get in touch with our team");
        
        public function AccessibilityExample() {
            configureAssets();
            setTimeout(updateAccessibility, 2000); 
        }
        
        private function updateAccessibility():void {
            trace("Accessibility.active: " + Accessibility.active);
            if(Accessibility.active) {
                Accessibility.updateProperties();
            }
        }
        
        private function configureAssets():void {
            var child:CustomAccessibleButton;
            for(var i:uint; i < menuLabels.length; i++) {
                child = new CustomAccessibleButton();
                child.y = (numChildren * (BUTTON_HEIGHT + gutter));
                child.setLabel(menuLabels[i]);
                child.setDescription(menuDescriptions[i]);
                addChild(child);
            }
        }
    }
}
    
import flash.accessibility.AccessibilityProperties;
import flash.display.Shape;
import flash.display.SimpleButton;
import flash.display.Sprite;
import flash.events.Event;
import flash.text.TextFormat;
import flash.text.TextField;


class CustomAccessibleButton extends Sprite {
    private var button:SimpleButton;
    private var label:TextField;
    private var description:String;
    private var _name:String;
        
    public function CustomAccessibleButton(_width:uint = 0, _height:uint = 0) {
        _width = (_width == 0) ? AccessibilityExample.BUTTON_WIDTH : _width;
        _height = (_height == 0) ? AccessibilityExample.BUTTON_HEIGHT : _height;
        
        button = buildButton(_width, _height);
        label = buildLabel(_width, _height);
            
        addEventListener(Event.ADDED, addedHandler);
    }
        
    private function addedHandler(event:Event):void {
        trace("addedHandler: " + this._name);
        var accessProps:AccessibilityProperties = new AccessibilityProperties();
        accessProps.name = this._name;
        accessProps.description = description;
        accessibilityProperties = accessProps;
        removeEventListener(Event.ADDED, addedHandler);
    }
        
    private function buildButton(_width:uint, _height:uint):SimpleButton {
        var child:SimpleButton = new CustomSimpleButton(_width, _height);
        addChild(child);
        return child;
    }

    private function buildLabel(_width:uint, _height:uint):TextField {
        var format:TextFormat = new TextFormat();
        format.font = "Verdana";
        format.size = 11;
        format.color = 0xFFFFFF;
        format.align = TextFormatAlign.CENTER;
        format.bold = true;
        
        var child:TextField = new TextField();
        child.y = 1;
        child.width = _width;
        child.height = _height;
        child.selectable = false;
        child.defaultTextFormat = format;
        child.mouseEnabled = false;
            
        addChild(child);
        return child;
    }
        
    public function setLabel(text:String):void {
        label.text = text;
        this._name = text;
    }
        
    public function setDescription(text:String):void {
        description = text;
    }
}
    
class CustomSimpleButton extends SimpleButton {
    private var upColor:uint = 0xFFCC00;
    private var overColor:uint = 0xCCFF00;
    private var downColor:uint = 0x00CCFF;

    public function CustomSimpleButton(_width:uint, _height:uint) {
        downState = new ButtonDisplayState(downColor, _width, _height);
        overState = new ButtonDisplayState(overColor, _width, _height);
        upState = new ButtonDisplayState(upColor, _width, _height);
        hitTestState = new ButtonDisplayState(upColor, _width, _height);
        useHandCursor = true;
    }        
}

class ButtonDisplayState extends Shape {
    private var bgColor:uint;
    private var _width:uint;
    private var _height:uint;

    public function ButtonDisplayState(bgColor:uint, _width:uint, _height:uint) {
        this.bgColor = bgColor;
        this._width = _width;
        this._height = _height;
        draw();
    }

    private function draw():void {
        graphics.beginFill(bgColor);
        graphics.drawRect(0, 0, _width, _height);
        graphics.endFill();
    }
}




[ X ]為什麼顯示英文?
「ActionScript 3.0 參考」的內容是以英文顯示

並非所有「ActionScript 3.0 參考」的內容都翻譯為所有語言。當語言元素未翻譯時,就會以英文顯示。例如,ga.controls.HelpBox 類別並沒有翻譯為任何語言。因此在參考的繁體中文版本中,ga.controls.HelpBox 類別就會以英文顯示。