Phaser.Signal: listener is a required param of add() and should be a Function.

[tobymcfly]

Hey.

So im trying to make a game where you can pickup this box with a chicken. This is the code i use to create the box, but it says error: "" 

What's going on?

I've a version where i dont have any states for the game, and it's working fine. But when i try to implement my code inside the game with states code, it comes up with this error. The rest of the code is working fine

 

for (var i = 0; i < 1; i++)
        {
            //box
            var b = boxGroup.create(0, 0, 'box');
            b.name = 'box' + i;
            b.exists = false;
            b.visible = false;
            b.checkWorldBounds = true;
            b.events.onOutOfBounds.add(function(){resetBox, this};
            var idle = b.animations.add('idle');
            b.animations.play('idle', 10, true);
            b.body.drag = new Phaser.Point(100, 100);
            b.body.drag.y = -400;
            b.anchor.setTo(0.5, 0.5);
            b.scale.setTo(0.6, 0.6);
            b.body.setSize(231.6, 226.8, 50);
            b.body.collideWorldBounds = true;
        }

[rich]

Signal callbacks need to be a reference to a function, which is only run when the event fires. You should likely change your code to be: `onOutOfBounds.add(resetBox, this)` (assuming resetBox is in the local scope)

[hektor74]

Or I think you can use fat arrow function like:

 b.events.onOutOfBounds.add(():void=>{

//resetBox function content

}, this};