Can anyone can help me with this issue.
I have no idea with this issue.
Just keep getting this issue.
Already try modify from this
function init(e:Event = null) to function init() or function init(e:Event)
Appreciated who can help me with this.
If no issue on this, it should show food not my stage.
package {
import flash.display.MovieClip;
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.events.Event;
public class Main extends MovieClip {
var snake:Array;
var score:Number;
public function Main() {
// constructor code
if(stage)
addEventListener(Event.ADDED_TO_STAGE, init);
else
init();
}
function init(e:Event = null):void {
//initialize
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
function onEnterFrame(e:Event):void {
var food:Food = new Food();
this.addChild(food);
trace("food");
}
}
}
Your code is almost correct.
Replace if (stage) to if (!stage).
If error still happens attach FLA.
Related
I have a .fla file names test.fla and I have this variable in it:
import Main;
var my_var;
stage.addEventListener(MouseEvent.CLICK, onLoaded);
function onLoaded(e:Event):void
{
my_var = "Maziar";
//trace(my_var);
}
I have a .as file called Main.as.
I want to pass my_var from test.fla to the Main.as.
I will really appreciate, if you can help me in this matter!
It is noticeable that I have used the method mentioned in "Actionscript 3 : pass a variable from the main fla to external as file", but it does not work for me!!!
I wrote in my Main.as:
package
{
import flash.display.Sprite;
import flash.geom.Point;
import flash.events.MouseEvent;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.events.Event;
public class Main extends Sprite
{
public function Main()
{
if (stage)
{
init();
}
else
{
addEventListener(Event.ADDED_TO_STAGE, init);
}
addEventListener(Event.ENTER_FRAME, waitForMyVar);
}
private function waitForMyVar(e:Event):void
{
if (my_var != null)
{
trace(my_var);
removeEventListener(Event.ENTER_FRAME, waitForMyVar);
}
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
}
...
}
}
Thanks in advance!
It's important to note that the constructor Main in your ActionScript document file is run before the code found within the frame. When you are attempting to access the my_var variable in your AS document it has not yet been declared in the frame.
So, we need to wait for Flash to run the frame. This can be done using an Event.ENTER_FRAME listener.
Example:
Timeline Code (.fla file)
var my_var:String = "my variable";
Document Code (.as file)
package {
import flash.display.MovieClip;
import flash.events.Event;
public class Main extends MovieClip {
public function Main() {
addEventListener(Event.ENTER_FRAME, waitForMyVar);
}
private function waitForMyVar(e:Event):void {
trace(my_var);
removeEventListener(Event.ENTER_FRAME, waitForMyVar);
}
}
As a side note, it appears my_var is not assigned a value until the user has clicked the stage. An adjustment could be made in the waitForMyVar function to wait for my_var to be non-null.
Example:
if(my_var != null) {
trace(my_var);
removeEventListener(Event.ENTER_FRAME, waitForMyVar);
}
Hope this helps!
Use static class members.
public class Main extends Sprite
{
static public var globalVar:* = 1;
public function doWhatever():void
{
trace(globalVar);
}
}
Then in FLA:
import Main;
var M:Main = new Main();
// or use sprite instance of Main
M.doWhatever();
Main.globalVar = "Hello World!";
M.doWhatever();
I'm a beginner to this program, the code is
package {
import flash.display.Sprite;
import flash.events.Event;
import flash.text.TextField;
/**
*...
* #author FXDS
*/
public class Main extends Sprite
{
public function Main():Void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
// entry
var greeting:TextField = new TextField();
}
greeting:text = ("Hello World");
greeting.x = 100;
greeting.y = 100;
addChild(greeting);
}
}
However, when I run it, the program complains with the following error :
\src\Main.as(23): col: 17 Error: A constructor cannot specify a return type.
Any Help would be greatly appreciated.
You get that error because you have a little mistake in your code :
public function Main():Void { }
should be
public function Main():void { }
the compiler didn't know Void (with a capital V) which is different from void.
and to avoid that mistake in the future, you can simply write :
public function Main() { }
Hope that can help.
I have the simplest code ever. Main class:
package
{
import field.Field;
import flash.display.Sprite;
import flash.events.Event;
public class Main extends Sprite
{
public function Main():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
var field:Field = new Field();
addChild(field);
field.test();
}
}
}
and a Field class:
package field
{
import flash.display.Sprite;
public class Field extends Sprite
{
public function Field()
{
super();
}
public function test():void
{
}
}
}
test method is presented.
But when I try to compile I get this:
Main.as(26): col: 10 Error: Call to a possibly undefined method test.
field.test();
How could this be happening?
field is your package, that's why you can not do field.test(). So you have to choose another name of your Field instance. You can do like this :
var _field:Field = new Field();
addChild(_field);
_field.test();
Hope that can help.
I have a problem with the stage.addeventlistner. After doing some research i found some hints that it probably isn't instantiated.
How do I do that?
typeerror error #1009 cannot access a property or method of a null object reference
(the line it refers to is the stage.addeventlistener)
The code with only the important bits
package
{
import flash.display.MovieClip;
import flash.events.*;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.geom.Point;
public class TesTrun extends MovieClip
{
var leftPressed:Boolean = false;
var rightPressed:Boolean = false;
var upPressed:Boolean = false;
var downPressed:Boolean = false;
public function TestRun()
{
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
stage.addEventListener(Event.ENTER_FRAME, loop);
//there is more code down here but i don't think that has to be included
}
}
}
You can use the ADDED_TO_STAGE event to trigger your init code :
public function TestRun()
{
addEventListener(Event.ADDED_TO_STAGE, init);
}
public function init(e:Event):void
{
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
stage.addEventListener(Event.ENTER_FRAME, loop);
}
I did the following
package classes
{
// imports removed
public class Main extends MovieClip {
// vars removed
public function Main():void {
trace('--> Main Function started ...');
/**************************************
Preloader
**************************************/
var preLoader:PreLoader = new PreLoader(); // init
stage.addChild(preLoader); // to Stage
stage.loaderInfo.addEventListener(ProgressEvent.PROGRESS, preLoader.preloaderProgress); // calling the function
doThis();
}
}
With the PreLoader Class looking like this:
package classes {
// imports removed
public class PreLoader extends MovieClip {
public var totalBytes:uint;
public var loadedBytes:uint;
public function PreLoader() {
trace('--> PRELOADER Started ...');
this.addEventListener(Event.ADDED_TO_STAGE, addedHandler);
this.loaderBar.scaleX = 0;
}
private function addedHandler(e:Event):void {
trace('Adding Preloader ...');
totalBytes = this.stage.loaderInfo.bytesTotal;
trace('PL: Total ' + totalBytes + ' / ' + loadedBytes);
this.removeEventListener(Event.ADDED_TO_STAGE, addedHandler);
preloaderProgress(e);
}
public function preloaderProgress(e:Event):void {
trace('Progress...');
loadedBytes = this.stage.loaderInfo.bytesLoaded;
this.loaderBar.scaleX = loadedBytes / totalBytes;
this.loaderBar.alpha = 1 - this.loaderBar.scaleX;
if (totalBytes == loadedBytes) {
trace('Removing PreLoader ...');
this.parent.removeChild(this);
}
}
}
}
The Problem: The Preloader is not displayed BEFORE the inital SWF-file has finished loading. Even all the tracing outputs start when the main movie is finished - i did some profiling on 'slow connections'.
If you wonder: doThis() is loading data from a xml-file, from here everything is fine, tracing outputs are at the right time (but too late at all :D)
Thank you in advance!
Edit: Maybe the question is: Is there a way to determine when the main movie is starting to load?
Make sure that you don't have any content other than the preloader on stage in the first frame. Otherwise all that content will have to load before the preloader starts up.
If you are working in FlashIDE you have to put your preloader into the first frame. If you prefer to use another IDE you should use Frame metatag. Example:
Main.as
package com.sample.preloader
{
import flash.display.Sprite;
import flash.events.Event;
/**
* ...
* #author Author
*/
[Frame(factoryClass="com.sample.preloader.Preloader")]
public class Main extends Sprite
{
public function Main():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
// entry point
}
}
}
Preloader.as
package com.sample.preloader
{
import flash.display.DisplayObject;
import flash.display.MovieClip;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.events.IOErrorEvent;
import flash.events.ProgressEvent;
import flash.utils.getDefinitionByName;
/**
* ...
* #author Author
*/
public class Preloader extends MovieClip
{
public function Preloader()
{
if (stage) {
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
}
addEventListener(Event.ENTER_FRAME, checkFrame);
loaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
loaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioError);
// TODO show loader
}
private function ioError(e:IOErrorEvent):void
{
trace(e.text);
}
private function progress(e:ProgressEvent):void
{
// TODO update loader
}
private function checkFrame(e:Event):void
{
if (currentFrame == totalFrames)
{
stop();
loadingFinished();
}
}
private function loadingFinished():void
{
removeEventListener(Event.ENTER_FRAME, checkFrame);
loaderInfo.removeEventListener(ProgressEvent.PROGRESS, progress);
loaderInfo.removeEventListener(IOErrorEvent.IO_ERROR, ioError);
// TODO hide loader
startup();
}
private function startup():void
{
var mainClass:Class = getDefinitionByName("com.sample.preloader.Main") as Class;
addChild(new mainClass() as DisplayObject);
}
}
}