| 套件 | org.osmf.media |
| 類別 | public class MediaFactory |
| 繼承 | MediaFactory  EventDispatcher Object |
| 子類別 | DefaultMediaFactory |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | OSMF 1.0 |
| 執行階段版本: | Flash Player 10, AIR 1.5 |
The factory operation takes a MediaResourceBase as input and produces a MediaElement as output.
The MediaFactory maintains a list of MediaFactoryItem objects, each of which encapsulates all the information necessary to create a specific MediaElement. The MediaFactory relies on the canHandleResourceFunction method of each MediaFactoryItem to find a MediaFactoryItem object that can handle the specified MediaResourceBase.
The factory interface also exposes methods for querying for specific MediaFactoryItem objects, and for loading plugins (which hold MediaFactoryItem objects).
相關 API 元素
隱藏繼承公用屬性
顯示繼承公用屬性| 方法 | 定義自 | ||
|---|---|---|---|
 | addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。 | EventDispatcher | |
|
會將事件傳送到事件流程。 | EventDispatcher | |
|
會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。 | EventDispatcher | |
|
指出物件是否有已定義的指定屬性。 | Object | |
|
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 | |
|
指出指定的屬性是否存在，以及是否可列舉。 | Object | |
|
會從 EventDispatcher 物件移除偵聽程式。 | EventDispatcher | |
|
為迴圈作業設定動態屬性的可用性。 | Object | |
|
傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
|
會傳回指定之物件的字串形式。 | Object | |
|
會傳回指定之物件的基本值。 | Object | |
|
檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。 | EventDispatcher | |
| 方法 | 定義自 | ||
|---|---|---|---|
Returns the most appropriate MediaFactoryItem for the specified resource
out of the MediaFactoryItems in the specified list. | MediaFactory | ||
| 事件 | 摘要 | 定義自 | ||
|---|---|---|---|---|
| [廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。 | EventDispatcher | ||
| [廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。 | EventDispatcher | ||
resolveItems | () | 方法 |
protected function resolveItems(resource:MediaResourceBase, items:Vector.<MediaFactoryItem>):MediaFactoryItem
Returns the most appropriate MediaFactoryItem for the specified resource
out of the MediaFactoryItems in the specified list.
This method is invoked when createMediaElement is invoked
with a resource that more than one MediaFactoryItem can handle. Subclasses
can override to select the most appropriate one.
The default behavior is to select the first item which is not "native" to
the framework, under the theory that plugins ought to take precedence over
core media types. It makes this decision based on the presence or absence
of an id value which starts with "org.osmf".
參數
resource:MediaResourceBase | |
items:Vector.<MediaFactoryItem> |
MediaFactoryItem |
package org.osmf.media
{
import flash.display.Sprite;
import org.osmf.events.MediaFactoryEvent;
public class MediaFactoryExample extends Sprite
{
public function MediaFactoryExample()
{
// Construct a media factory, and listen to its plug-in related events:
var factory:MediaFactory = new MediaFactory();
factory.addEventListener(MediaFactoryEvent.PLUGIN_LOAD, onPluginLoaded);
factory.addEventListener(MediaFactoryEvent.PLUGIN_LOAD_ERROR, onPluginLoadError);
// Instruct the factory to load the plug-in at the given url:
factory.loadPlugin(new URLResource("http://myinvalidurl.com/foo.swf"));
}
private function onPluginLoaded(event:MediaFactoryEvent):void
{
// Use the factory to create a media-element related to the plugin:
var factory:MediaFactory = event.target as MediaFactory;
factory.createMediaElement(new URLResource("http://myinvalidurl.com/content"));
}
private function onPluginLoadError(event:MediaFactoryEvent):void
{
// Handle plug-in loading failure:
trace("Plugin failed to load.");
}
}
}
Tue Jun 12 2018, 03:47 PM Z