Skipping to next game level in AS3

I am in the process of building a game with around 20 levels. Now, as I was thinking of trying to add a "skip" option to the game with the space bar key. I have a little trouble, since holding down the spacebar invokes the KeyboardEvent.KEY_DOWN event multiple times.

The above scenario (Keydown and keyup) works just fine when I'm trying to move my player character on screen. The one main concern that is lingering in my mind is "Is this going wrong because the KeyboardEvent listeners do get removed and added when changing levels?"

P.S: Adding the skip 开发者_如何学运维option as a button works just fine, but I'd really like to use Spacebar for the ease of use.

Listen for KeyboardEvent.KEY_UP as well, and keep a boolean that acts as a switch. If the keyboard is pressed AND the boolean is false, set the boolean to true and proceed. Then, when the key_up event callback is invoked, reset the boolean to false.

Does somethig like this work for you?

private function levelInit () : {
  // ...
  stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownListener);  
  // ...
}

private function keyDownListener (e : KeyboardEvent) : void {
  if (e.keyCode == Keyboard.SPACE) {
    stage.removeEventListener(KeyboardEvent.KEY_DOWN, keyDownListener);
    // add stuff to initiate the level skip
  }
}

You could also call the stage.addEventListener from a setTimeout to delay adding the listener to protect things more.

Remove the key_down listener in the function and add a key_up listener. Then in the key_up function remove that listener and add back the key_down listener.