包 | com.adobe.icomm.assetplacement.model |
类 | public final class PackageDefinitionLoader |
继承 | PackageDefinitionLoader ![]() |
语言版本: | ActionScript 3.0 |
产品版本: | Asset Placement Building Block 9.5 |
运行时版本: | AIR 1.0, Flash Player 9, Flash Player 10 |
The PackageDefinition
object loads the package definition file (package.xml) in a
non-blocking operation. The PackageDefinitionLoader uses an eventListener/eventDispatcher mechanism
to get a reference to the PackageDefinition object, in order to ensure:
- That every caller gets access to the same object (to prevent redundant loading of the package.xml file); and
- That the package is fully loaded before a caller makes use of it.
In order to get a reference to the PackageDefinition object, add an event listener for the
PackageDefinitionReadyEvent and make a call to getPackageDefinition()
. When
the PackageDefinition object is ready for use, the listener will be called. Add an event listener for the
PackageDefinitionLoadFailed event to get notification that the package definition failed to load.
Note: the PackageDefinitionReadyEvent listener should be removed once the event fires; if it is not removed the event may fire multiple times when other requesters ask for the PackageDefinition object.
相关 API 元素
com.adobe.icomm.assetplacement.model.PackageDefinitionReadyEvent
com.adobe.icomm.assetplacement.model.PackageDefinitionLoadFailedEvent
方法 | 由以下参数定义 | ||
---|---|---|---|
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表示对象是否已经定义了指定的属性。 | Object | |
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表示 Object 类的实例是否在指定为参数的对象的原型链中。 | Object | |
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表示指定的属性是否存在、是否可枚举。 | Object | |
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设置循环操作动态属性的可用性。 | Object | |
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返回此对象的字符串表示形式,其格式设置遵守区域设置特定的约定。 | Object | |
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返回指定对象的字符串表示形式。 | Object | |
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返回指定对象的原始值。 | Object |
public function init():void { PackageDefinitionLoader.addEventListener(PackageDefinitionReadyEvent.PACKAGE_DEFINITION_READY, onPackageDefinitionReady); PackageDefinitionLoader.addEventListener(PackageDefinitionLoadFailedEvent.PACKAGE_DEFINITION_LOAD_FAILED, onPackageDefinitionLoadFailed); PackageDefinitionLoader.readyPackageDefinition(); } public function onPackageDefinitionReady(event:PackageDefinitionReadyEvent):void { // Once we get the ready event, we don't want to listen for it anymore PackageDefinitionLoader.removeEventListener(PackageDefinitionReadyEvent.PACKAGE_DEFINITION_READY, onPackageDefinitionReady); PackageDefinitionLoader.removeEventListener(PackageDefinitionLoadFailedEvent.PACKAGE_DEFINITION_LOAD_FAILED, onPackageDefinitionLoadFailed); var packageDef:PackageDefinition = event.packageDefinition; } public function onPackageDefinitionLoadFailed(event:PackageDefinitionLoadFailedEvent):void { PackageDefinitionLoader.removeEventListener(PackageDefinitionReadyEvent.PACKAGE_DEFINITION_READY, onPackageDefinitionReady); PackageDefinitionLoader.removeEventListener(PackageDefinitionLoadFailedEvent.PACKAGE_DEFINITION_LOAD_FAILED, onPackageDefinitionLoadFailed); var error:String = event.error; }
Tue Jun 12 2018, 11:04 AM Z