IEnumerator seems not to be recognized by the editor

Unity Engine
1

I am using WaitForSeconds to dissapear an object and then to make it visible again and I noticed that IEnumerator seems not to be recognized in the editor. My code is shown below and, in the editor, the word “IEnumerator” appears in red and when I hover the mouse over it I get a tooltip saying “error CS0103: the name IEnumerator does not exist in the current context”. However, the code runs fine. I thought that I had missed a using statement but “using System.Collections” is included and it seems IEnumerator is part of such a namespace. I use the default Mono Develop Unity3D editor. I will very much appreciate your comments.

IEnumerator RespawnWaitTime()
	{
		this.renderer.enabled = false;
        // respawnWaitTime has been instanciated in advanced.
		yield return respawnWaitTime;
		this.renderer.enabled = true;
	}
2

You need to add the following line at the top of your script:

using System.Collections;
3

That line is in my code already. There are 2 using statements at the beginning of my code as follows:

using UnityEngine;
using System.Collections;
4

Can you post the whole script?

5

Here is the complete code. In my editor the word “IEnumerator” appears in red and also, when I hover the mouse over it I see a tooltip with the following text: “error CS0103: the name IEnumerator does not exist in the current context”. Nevertheless, the code executes correctly without any run-time error.

using UnityEngine;
using System.Collections;

public class scriptEnemy : MonoBehaviour {
	// ------------------------------
	// Public variables.
	// ------------------------------
	public int intNumberOfClicks = 2;
	WaitForSeconds fltRespawnWaitTime = new WaitForSeconds(2);
	public Color[] shapeColor = new Color[5];
	public Transform explosion;

	// ------------------------------
	// Private variables.
	// ------------------------------

	// -----------------------------------------------------------------------------------------
	// Use this for initialization
	// -----------------------------------------------------------------------------------------
	void Start () {
	}

	// -----------------------------------------------------------------------------------------
	// Update is called once per frame
	// -----------------------------------------------------------------------------------------
	void Update () {
		if (intNumberOfClicks <= 0) 
		{
			if (explosion)
			{
				this.Instantiate(explosion, transform.position, transform.rotation);
			}
			Vector3 v3Position = new Vector3(Random.Range(-4.8f, 4.8f), Random.Range(-3.5f, 3.5f), 0.0f);
			StartCoroutine(RespawnWaitTime());
			transform.position = v3Position;
			intNumberOfClicks = 2;
		}
	}

	// -----------------------------------------------------------------------------------------
	// Hide the object for an amount of time and then unhide it.
	// -----------------------------------------------------------------------------------------
	IEnumerator RespawnWaitTime()
	{
		this.renderer.enabled = false;

		// Not a good choice because everytime "new WaitForSeconds(fltRespawnWaitTime)" is executed
		// there are 21 bytes of garbage allocation.
		// The best practicce is to instanciate it in advance (see Public Variables above).
		//yield return new WaitForSeconds(fltRespawnWaitTime);

		yield return fltRespawnWaitTime;
		RandomColor ();
		this.renderer.enabled = true;
	}

	// -----------------------------------------------------------------------------------------
	// Changes the color of an object randomly.
	// -----------------------------------------------------------------------------------------
	void RandomColor()
	{
			int newColor = Random.Range (0, 4);
			renderer.material.color = shapeColor [newColor];
	}
}
6

Using your same script, I do not get the same error. Perhaps build a test project?

7

You’ve probably solved this by now, but if not, I have had that problem before. I was using the latest .net framework and I went to Programs and Features within control panel (if you’re using Windows) and selected the box to also run .net framework 3.5 I think it was.

I then shut down my project after saving, restarted my machine and it worked fine.

8

i have same error like that but i still ignore and it work

9

I’m having this error show up and still able to run the project, still looking into why ManoDevelop is doing this

10

i am suffering same error

11

And everyone is suffering from this super old thread being necroed. All that is happening is lack of understand here.

If you have a problem, don’t lazy-post and just say “same error”; create your own thread, post the details and maybe someone will help.

Let’s close this thread.

2 Likes