HaxeFlixel - FlxSubState unexpected null object reference

Question

Im trying to make simple ingame menu. Im using FlxSubState class. First im trying invoke substate in main game state with openSubState(gameMenu); after pressing Esc.

There is code in my substate class, this class inheriting FlxSubState:

override public function create():Void 
{
    super.create();     
    continueButton = new FlxButton(0,0, "Continue", continueGame);
    continueButton.x = FlxG.width / 2 - continueButton.width / 2;
    continueButton.y = FlxG.height / 2 - continueButton.height / 2;
    add(continueButton);
}

private function continueGame():Void
{
    close();    
}

Problem is : everytime after click on continueButton game crash with null exception in FlxTypedGroup. I think its in close(); method but i really cannot figure it out. Can anyone help me ? Or suggest better way to implement ingame menu ?

Answer 1

Figured it out by myself. Looks like that after closing substate is destroyed. So something like this

override public function create():Void
{
    super.create();
    gameMenu = new MySubstate();
}

using with this

openSubState(gameMenu);

wont work.

Instead i need to create new substate directly

openSubState(new MySubstate());