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Question by JiveViking · Jul 03, 2020 at 06:27 PM · guiinstantiateprefabslidertroubleshooting

Reference an instantiated UI publically

I am trying to create a healthbar UI using a slider, I want it to Instantiate above an enemy and I want the enemy script to reference that instance so that I can update its transform, I want to instantiate it in the start method and then update it's script in the update method.

 public Slider healthbar // prefab
 public Slider newHealthBar // I want to assign the instantiated one to this so that I can update it
 
 void Start() {
 newHealthBar = Instantiate(healthbar,Camera.main.WorldToViewportPoint(transform.position) , healthbar.transform.rotation, GameObject.FindGameObjectWithTag("Canvas").transform);
 }

When I try to run this code it tells me that I am not assigning the reference

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avatar image N-8-D-e-v · Jul 03, 2020 at 07:42 PM 0
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what is the error specifically?

avatar image JiveViking N-8-D-e-v · Jul 03, 2020 at 07:52 PM 0
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NullReferenceException: Object reference not set to an instance of an object Enemy.Start ()

I have also tried changing the reference type to GameObject, same error

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Answer by JiveViking · Jul 03, 2020 at 07:58 PM

I have figured out the issue in this case, I simply didn't set the canvas tag

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