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Arioman
Arioman
Inspiring
March 12, 2013
Answered

using addEventListener for Enter and Exit frame

  • March 12, 2013
  • 1 reply
  • 11787 views
hi , sometimes i want to set some function in specific frame in start and exit this frame
for example i have Flv player in frame 20 , i have background sound ( mp3 player ) so i want when swf goes to this frame my sound goes Off and when Exit from it and go to another frames the sound played again ...
i put these script in frame 20 :
addEventListener(Event.ENTER_FRAME,enterfunc);
 
function enterfunc(e:Event):void {
    trace("I started");
}
 
 
addEventListener(Event.EXIT_FRAME,exitfunc);
 
function exitfunc(e:Event):void {
    trace("will Exit");
}
but after test movie i see I started and will Exit runs Repeatly without stoping !!
Notice : first i put my sndChannel = soundClip.play; and sndChannel = soundClip.stop;  but my music runs over and over and finally my system Hanged and need to Restart so i use trace to see

so whats a problem ?  thanks for spending time and help me

This topic has been closed for replies.
Correct answer kglad

because their names are misleading.  Event.EXIT_FRAME doesn't execute once when the playhead exits a frame.  it executes repeatedly.

likewise, Event.ENTER_FRAME doesn't execute once when the playhead enters a frame.  it executes repeatedly.

you can execute a function when the playhead enters a a frame by adding a function call to the frame:

f();  // attached to a frame will call the function f when the playhead enters this frame.  and there are other ways to do this.

you can execute a function when a playhead exists a frame by invalidating the stage and using a render event when a goto is executed:

stage.invalidate();

this.addEventListener(Event.RENDER,exitingF);

this.gotoAndPlay('whatever');

function exitingF(e:Event):void{

// this code executes when this frame is exited and 'whatever' is rendered (=displayed);

}

1 reply

kglad
kglad
Community Expert
March 12, 2013

those probably aren't going to do what you want but, if you wanted each to execute once, remove the event listener.

but again, i doubt that will do what you want.

you probaby want to use an Event.ADDED_TO_STAGE listener and Event.REMOVED_FROM_STAGE listener appied to your flvplayback component to trigger your background music to stop and play:

flv_pb.addEventListener(Event.ADDED_TO_STAGE, addedF);

flv_pb.addEventListener(Event.REMOVED_FROM_STAGE, removedF);

function addedF(e:Event):void{

sndChannel.stop();

}

function removedF(e:Event):void{

sndChannel=soundClip.play();

}

Arioman
AriomanAuthor
Inspiring
March 12, 2013

thanks Kglad .

i will test your tips tomorrow and as i know you i know it will help me as always ...

but just for know can you tell me why addEventListener and Event.EXIT_FRAME or Event.ENTER_FRAME runs repeatly and what script i must use if i want to add function in start or Exit frame at Once ?

cause maybe i want to use this in frames that have not Flv player or any Movieclip with instance name ...

am i forced to put some movieclip in frame and then use Event.ADDED_TO_STAGE and Event.REMOVED_FROM_STAGE script to them always ?!

kglad
kglad
Community Expert
March 12, 2013

thanks Dear Kglad for spending Time for me

your script works well in Enter Frame

but how i must use this for Exit Frame ?  am i must use removeEventListener for this ?



depending on exactly what you want and what's going on in the swf there are better and worse ways to detect what you want.

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