Destroy sprite from group in update - TypeError: Cannot read property 'alive' of null

[Mike]

I got this setup:

update: function() { this.balls.forEach(this.ballUpdate, this);}

ballUpdate: function(ball) {if (ball.body.y > this.game.world.height + ball.height) {ball.destroy();}}

Which results in:

 

1. Uncaught TypeError: Cannot read property 'alive' of null Game.js:566
   1. BasicGame.Game.ballUpdateGame.js:566
   2. Phaser.Group.forEachphaser.js:12324
   3. BasicGame.Game.updateGame.js:173
   4. Phaser.StateManager.updatephaser.js:10138
   5. Phaser.Game.updatephaser.js:13701
   6. Phaser.RequestAnimationFrame.updateRAFphaser.js:22114
   7. _onLoopphaser.js:22099

 

 

I tried: 

 

update: function() {   if(this.balls.countLiving() > 0) {      this.balls.forEach(this.ballUpdate, this);  }}

[Vidsneezes]

I'm not sure if it was a typo, but your ballUpdate function is missing the ball as a parameter.

 

[Mike]

Yes, It was Typo, I'll upload the full game example soon if I don't find a fix... if I find then soon the whole game will be publicly available

[Terumi]

Do you use masks?

If you have a mask applied to a group, that group acuires some members that are not sprites...

[Mike]

No masks, nothing a simple group with sprites.... I'll make an "buggy example" later this night.

[hackenstein]

Heh, I have run into a similar problem. I have a group of display objects (text, sprites and buttons) that I want to destroy before removing everything in the group:

this.group.forEach(function(obj) {    if (obj.kill)        obj.kill();    else if (obj.destroy)        obj.destroy();});this.group.removeAll();

This results in an "Type Error: obj is null".

 

EDIT: I'm pretty sure this happens because Sprite.destroy now removes the sprite from its group. So you shouldn't destroy objects in a group with forEach