Cannot hide a canvas from trigger (err:Cannot implicitly convert type `UnityEngine.Canvas' to `UnityEngine.GameObject')

Questions & Answers
1

Hello i am still a begginer in scripting and i am looking trought some tutorial to make some test.
i am actually working on a script that hide a canvas when the player is on a zone or not (a light bulb that is Lighten when the player is in the light or not)

Its made from 2 script (one on the player itself and one on every light source with a sphere collider set to trigger)

LightCanvas is parented to another canvas.

Here’s the one on the player

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class InLight : MonoBehaviour {

	public bool OnOff;
	private GameObject lightUI;

	void Start ()
	{
		SetInitialReferences ();
	}

	public void Inlight()
	{
		if(OnOff = true)
		{
			lightUI.SetActive(true);
			Debug.Log ("On");
		}
	}

	public void Outlight()
	{
		if(OnOff = false)
		{
			lightUI.SetActive(false);
			Debug.Log ("Off");
		}
	}

	void SetInitialReferences()
	{
		lightUI = GameObject.Find("LightCanvas").GetComponent<Canvas>();
	}


}

and here’s the one on every light source:

using UnityEngine;
using System.Collections;

public class LightZone : MonoBehaviour
{

	private InLight illumination;

	void Start ()
	{
		SetInitialReferences();
	}

	void OnTriggerEnter (Collider other)
	{
		illumination.Inlight ();
		//Debug.Log (other.name+" is in the light");
	}

	void OnTriggerExit (Collider other)
	{
		illumination.Outlight ();
		//Debug.Log (other.name+" is in the Dark");
	}

	void SetInitialReferences()
	{
		illumination = GameObject.Find("Player1").GetComponent<InLight>();
	}
}

I get that error in the console:
Assets/MyAsset/Scripts/InLight.cs(35,17): error CS0029: Cannot implicitly convert type UnityEngine.Canvas' to UnityEngine.GameObject’

2

private GameObject lightUI;

void SetInitialReferences()
     {
         lightUI = GameObject.Find("LightCanvas").GetComponent<Canvas>();;
     }

light UI → GameObject and Canvas → Component. Here you are trying to call component as a GameObject. If you want to use component change lightUI as a Component variable. By the way your approach is not the best practice here. You can use another approach without using Find() method too much. It is not good for performance.

3

Script on the player:

(plug the image in the required field in unity inspector)

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class InLight : MonoBehaviour
{

	public bool OnOff;
	public Image lightUI;



	public void Offlight ()
	{
		OnOff = false;
			lightUI.enabled = false;
			Debug.Log ("OFF");

	}

	public void Onlight ()
	{
		OnOff = true;
			lightUI.enabled = true;
			Debug.Log ("ON");
			
			

			}
		
		


}

Script on every light source:

(plug the player1 in the required field in unity inspector)

using UnityEngine;
using System.Collections;

public class LightZone : MonoBehaviour
{
	public InLight illumination;



	void OnTriggerEnter (Collider other)
	{
		illumination.Onlight ();
		Debug.Log (other.name+" is in the light");
	}

	void OnTriggerExit (Collider other)
	{
		illumination.Offlight ();
		Debug.Log (other.name+" is in the Dark");
	}

}