lundi 23 novembre 2015

As3 flash error “Cannot access a property or method of a null object reference”

I came up with this error when testing my movie

TypeError: Error #1009: Cannot access a property or method of a null object reference. at ACTUALPROJECT_fla::MainTimeline/youLose()[ACTUALPROJECT_fla.MainTimeline::frame3:112] at ACTUALPROJECT_fla::MainTimeline/SharkEat()[ACTUALPROJECT_fla.MainTimeline::frame3:87]

this is my code

import flash.events.MouseEvent;
import flash.events.Event;
import flash.events.*;
import flash.utils.Timer;

var rectangle:Rectangle = new Rectangle(0,345,600,455);

turtle_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickupObject);
turtle_mc.addEventListener(MouseEvent.MOUSE_UP, dropObject);
turtle_mc.addEventListener(Event.ENTER_FRAME, handleCollision);
turtle_mc.addEventListener(Event.ENTER_FRAME, handleCollision2);
turtle_mc.addEventListener(Event.ENTER_FRAME, handleCollision4);
turtle_mc.addEventListener(Event.ENTER_FRAME, SharkEat);
turtle_mc.buttonMode = true;
turtle_mc.originalY = turtle_mc.y;
turtle_mc.originalX = turtle_mc.x;

function resetTurtlePosition()
{
    turtle_mc.y = turtle_mc.originalY;
    turtle_mc.x = turtle_mc.originalX;
}

function pickupObject(event:MouseEvent):void
{
    event.target.startDrag(false, rectangle);
}

function dropObject(event:MouseEvent):void
{
    event.target.stopDrag();
}


function handleCollision(e:Event):void
{


    if (plasticBag_mc.hitTestPoint(turtle_mc.x,turtle_mc.y,false))
    {

        youLose();

    }
    else
    {

    }
}
function handleCollision2(e:Event):void
{


    if (fishingBoat_mc.hitTestPoint(turtle_mc.x,turtle_mc.y,false))
    {

        youLose();

    }
    else
    {

    }
}
function handleCollision4(e:Event):void
{


    if (oilSpillBoat_mc.hitTestPoint(turtle_mc.x,turtle_mc.y,false))
    {

        youLose();

    }
    else
    {

    }
}
function SharkEat(e:Event):void
{


    if (shark_mc.hitTestPoint(turtle_mc.x,turtle_mc.y,false))
    {

        **youLose();**

    }
    else
    {

    }
}
var nCount:Number = 0;
var myScore:Timer = new Timer(10,nCount);
counter_txt.text = nCount.toString();
myScore.start();
myScore.addEventListener(TimerEvent.TIMER, countdown);
function countdown(e:TimerEvent):void
{
    nCount++;
    counter_txt.text = nCount.toString();

}

function youLose():void
{
    myScore.stop();
    turtle_mc.stopDrag();
    resetTurtlePosition();
    **this.storedtxt = counter_txt.text;**
    gotoAndStop(3,"PlayTheGame");
}

i have marked the two lines with asterix. I'm new to flash and AS3, can anyone help me out?

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