Unity3D：NullReferenceException即使我已经在Inspector中设置了它

Question

I am try to update GUI during Update() . Here is the code:

void Update()
    {
        Debug.Log(HPText == null);
        HPText.text = HP + " / " + MaxHP;
    }

I have already set the HPText through Inspector.

And I get the following in the console. It seems that it keep alternating between null and not null. How can I get rid of the error?

Answer 1

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Note: This is a summary answer based on my comment above.

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Sounds like you have more than one object running this script. Check your scene and remove the script from the second object. One object has the HPText property set, the other more than likely does not.

Thanks, you are right. I have 2 object using the same script. I forget to disable the one I am not using. – Joshua

Alternatively, you could set the HPText on the second object. You mentioned you have since disabled the second object - that works too.