Can an event handler return data?

Question

I program on AS3.

public static function isUserExist (): Boolean { var request:URLRequest = new URLRequest("https://какие-то_буковки); request.method = URLRequestMethod.GET; var loader:URLLoader = new URLLoader(); loader.addEventListener(Event.COMPLETE, completeLoad); loader.load(request); function completeLoad (): Boolean { if (loader.data != "null") return true; else if (loader.data == "null") return false; loader.removeEventListener(Event.COMPLETE, completeLoad); } }

I load the data from the server and, depending on it, should return a boolean value to the function that called the isUserExist () method. Can this be done somehow?

Shockwave shockwave 3,253 12 20 · Answer 1 · 2016-11-08T12:33:57

ActionScript 3 does not support synchronous code stopping. In completeLoad (), set some Boolean flag and read it.

Heterotroph heterotroph 53 four · Answer 2 · 2016-11-09T16:42:37

In this case, you should approach the issue using your events:

 public function isUserExist():void { //название метода следует изменить var request:URLRequest = new URLRequest("https://какие-то_буковки"); request.method = URLRequestMethod.GET; var loader:URLLoader = new URLLoader(); loader.addEventListener(Event.COMPLETE, completeLoad); loader.load(request); } private function completeLoad(e:Event):void { if (loader.data) { //Я не уверен, может ли свойство URLLoader#data быть null уже после Event#COMPLETE dispatchEvent(new MyEvent(MyEvent.SUCCESSFULL)); } else { dispatchEvent(new MyEvent(MyEvent.FAILED)); } }

And "outside" already handle events.

 var myClass:MyClass = new MyClass(); myClass.addEventListener(MyEvent.SUCCESSFULL, successfullHandler); myClass.addEventListener(MyEvent.FAIL, failHandler); myClass.isUserExist(); *** private function successfullHandler(e:MyEvent):void { } private function failHandler(e:MyEvent):void { }

You must first create a new class MyEvent, inherited from the Event. Carefully consider the values of the constants, since They can "cross" with existing events.

 public class MyEvent extends Event { public static const SUCCESSFULL:String = "mySuccessfull"; public static const FAIL:String = "myFail"; public function MyEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false) { super(type, bubbles, cancelable); } }

Can an event handler return data?

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