2 replies to this topic

[Gathanderoth]

Hi

I am making a flash presentation for uni and what I have is an intro screen, a menu with buttons and then all the different scenes of information which have a back to menu button and a next and previous button for going back and forth between the information. On each frame I have a heading and all the headings are dynamic text boxes and they all have instance names. I am using Actionscript 3 and what I have is in the Actions is that the heading moves across the screen and then stop. I am using an ENTER_FRAME so that when it enters the frame the headings move but when I go to the next frame or I click a button when it goes to the next or previous frame I get the error in the output window

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at HowdoesDRMworks9_fla::MainTimeline/moveTitle()

Here is the code I am using:

//this tell name_Txt to be placed at the x coordinate -230
name_Txt.x=-230;
//This defines an enter frame event
name_Txt.addEventListener(Event.ENTER_FRAME, moveName);
function
moveName(event:Event):void {
//This tells name_Txt that if it is less that the x coodinate 300 then move title_Txt along x by -20.
if(name_Txt.x<300){
name_Txt.x+=20;
}
}

The only thing that changes with this code on each frame is the text box instance name and the moveName.

It happens for every dynamic text that I have. I think it has something to do wit the ENTER_FRAME but I dont know.

I am in a hurry to get this finished so need to know what's going on ASAP

Please Help

James

[Gathanderoth]

I have had a look in the debug and it has something to do with this bit of code:

if(name_Txt.x<300){
name_Txt.x+=20;
}

If I comment out this code and then test is when I go to the next frame it doesnt give me this error but if i uncomment this bit off code it gives me the error when i go to the next frame

[Gathanderoth]

Problem Solved

I needed to put a remove.EventListener to all the buttons so that when the buttons where clicked and it went to the next frame it removed the ENTER_FRAME event so it didnt happen on the next frame.