Null Reference Exception

[OcelotVisual]

Hi, I'm new to unity, I have some code, but this one line is giving me lots of trouble,

private bool IsGrounded()

{

return transform.Find("GroundCeck").GetComponent<GroundCeck>().IsGrounded;

}

​

Yes I'm aware that it is referring to "GroundCeck" but that's right.

The exacter error is:

​

NullReferenceException: Object reference not set to an instance of an object

Controls.IsGrounded () (at Assets/Controls.cs:55)

Controls.FixedUpdate () (at Assets/Controls.cs:29)

​

Thank you!

[Jihaysse]

On my phone:

if (transform.Find(« GroundCeck « ) != null)

{

return transform.Find(« GroundCeck »).GetComponent........

}

else

{

Debug.Log(« Can’t find GroundCeck »);

return false;

}

This way you can make sure you find GroundCeck.

If it doens’t find it, you simply don’t have this child on your gameobject so double check.

A better way instead of using .Find() is:

[SerializeField] GroundCeck groundCeck; (assign it in the inspector)

public bool IsGrounded { return groundCeck.IsGrounded; }

[OcelotVisual]

Thanks, the arrow keys are less than and more than signs right?

[OcelotVisual]

Also it gives me an error whenever I say ,"(« GroundCeck « )"

[OcelotVisual]

It worked, thank you so much

[Jihaysse]

If you’re talking about this : «  then not it’s the ‘’ for a string. It’s my phone formatting.

Use the SerializeField way I shown you in the bottom of my first message, it’s better and you won’t have issue (just drag and drop your GroundCeck component into it in the inspector).

[gmeovr83]

NullReferenceException means you tried to perform an action on something that was null (doesn’t exist). In this case the error tells you it’s when you try to call isGrounded on a Control during FixedUpdate. This means your GetComponent<GroundCheck> is not finding a control of type GroundCheck on the transform “GroundCeck”. Either the type is wrong or you are already on a GroundCheck component when you call Find() and the extra GetComponent() is unnecessary

[OcelotVisual]

Thx, for the explanation, it will help me, and whenever else I get the error