flash.events.UncaughtErrorEvents - Adobe® Flex® 4 Language Reference (Flex 4)

Package	flash.events
Class	public class UncaughtErrorEvents
Inheritance	UncaughtErrorEvents EventDispatcher Object

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10.1, AIR 2

The UncaughtErrorEvents class provides a way to receive uncaught error events. An instance of this class dispatches an uncaughtError event when a runtime error occurs and the error isn't detected and handled in your code.

Use the following properties to access an UncaughtErrorEvents instance:

LoaderInfo.uncaughtErrorEvents: to detect uncaught errors in code defined in the same SWF.
Loader.uncaughtErrorEvents: to detect uncaught errors in code defined in the SWF loaded by a Loader object.

To catch an error directly and prevent an uncaught error event, do the following:

Use a try..catch block to isolate code that potentially throws a synchronous error
When performing an operation that dispatches an event when an error occurs, register a listener for that error event

If the content loaded by a Loader object is an AVM1 (ActionScript 2) SWF file, uncaught errors in the AVM1 SWF file do not result in an uncaughtError event. In addition, JavaScript errors in HTML content loaded in an HTMLLoader object (including a Flex HTML control) do not result in an uncaughtError event.

Public Properties

Hide Inherited Public Properties

Show Inherited Public Properties

	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

Hide Inherited Public Methods

Show Inherited Public Methods

	Method		Defined By
		UncaughtErrorEvents() Creates an UncaughtErrorEvents instance.	UncaughtErrorEvents
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.	EventDispatcher
		dispatchEvent(event:Event):Boolean Dispatches an event into the event flow.	EventDispatcher
		hasEventListener(type:String):Boolean Checks whether the EventDispatcher object has any listeners registered for a specific type of event.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Removes a listener from the EventDispatcher object.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object
		willTrigger(type:String):Boolean Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.	EventDispatcher

Events

Click for more information on events

Hide Inherited Events

Show Inherited Events

	Summary	Defined By
activate	[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.	EventDispatcher
deactivate	[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.	EventDispatcher
uncaughtError	Dispatched when an error occurs and developer code doesn't detect and handle the error.	UncaughtErrorEvents

Constructor Detail

UncaughtErrorEvents

()

Constructor

public function UncaughtErrorEvents()

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10.1, AIR 2

Creates an UncaughtErrorEvents instance. Developer code shouldn't create UncaughtErrorEvents instances directly. To access an UncaughtErrorEvents object, use one of the following properties:

LoaderInfo.uncaughtErrorEvents: to detect uncaught errors in code defined in the same SWF.
Loader.uncaughtErrorEvents: to detect uncaught errors in code defined in the SWF loaded by a Loader object.

uncaughtError

Event

Event Object Type: flash.events.UncaughtErrorEvent
property UncaughtErrorEvent.type = flash.events.UncaughtErrorEvent.UNCAUGHT_ERROR

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10.1, AIR 2

Dispatched when an error occurs and developer code doesn't detect and handle the error.

Defines the value of the type property of an uncaughtError event object.

This event has the following properties:

Property	Value
`bubbles`	`true`
`cancelable`	`true`; cancelling the event prevents the uncaught error dialog from appearing in debugger runtime versions
`currentTarget`	The object that is actively processing the Event object with an event listener.
`error`	The uncaught error.
`target`	The LoaderInfo object associated with the SWF where the error happened.
`text`	Text error message.