StartCoroutine_Auto can only be called from the main thread.

Questions & Answers
1

Hi I’m having some problems with my code, I can assure that worked well, but now I jump with coroutines error … Here is the code to see if anyone can help me … I am using Ngui, then when you press a button called one of the coroutines, but now I get the error.

public IEnumerator WaitAlertView()
	{
		yield return new WaitForSeconds (0.2f);
		EtceteraBinding.hideActivityView();
		yield return new WaitForSeconds (0.6f);
		EtceteraBinding.showAlertWithTitleMessageAndButton("Error","Es posible que el nombre de usuario ya exista, por favor escoge otro nombre","Vale");
		
	}
	
	
	public IEnumerator WaitAlertView2()
	{
		
		yield return new WaitForSeconds (0.2f);
		EtceteraBinding.hideActivityView();
		yield return new WaitForSeconds (0.6f);
		EtceteraBinding.showAlertWithTitleMessageAndButton("Error","Se ha cancelado el registro","Vale");
	}
	
	public IEnumerator WaitAlertView3()
	{
		
		yield return new WaitForSeconds (0.2f);
		EtceteraBinding.hideActivityView();
		yield return new WaitForSeconds (0.6f);
		EtceteraBinding.showAlertWithTitleMessageAndButton("Error","El Login ha fallado, comprueba que su usuario y password son correctos","Vale");
	}
	
	public IEnumerator WaitAlertView4()
	{
		
		yield return new WaitForSeconds (0.2f);
		EtceteraBinding.hideActivityView();
		yield return new WaitForSeconds (0.6f);
		cargado = true;
	}
	
	
	
	// Update is called once per frame
	public void Update () 
	{
		
		
		myName = nameuser.text;
		myPassword = password.text;
		myEmail = email.text;
		loginUser2 = loginName.text;
		loginPass2 = loginPass.text;
		NivelCargado();
	
	
	
	}
	
	// Accion que se dispara cuando se pulsa el boton unirse a PLM
	public void SendUserToParse()
	{
		EtceteraBinding.showBezelActivityViewWithLabel("Creando usuario, un momento por favor");
		// Crear nuevo usuario en Base de datos
		
		var user = new ParseUser()
		{
			
		Username = myName,
		Password = myPassword,
		Email= myEmail
			
			
		};
		
		Task signUpTask = user.SignUpAsync().ContinueWith(t =>
		{
			if (t.IsCanceled)
			{
				
				StartCoroutine(WaitAlertView2());
			
				
				
			}
			else if ( t.IsFaulted)
			{
				
				
				StartCoroutine(WaitAlertView());
				
				
			}
			else
			{
				
					StartCoroutine(WaitAlertView4());
			}
			
		});
		
		
	}
	
	// Accion que se dispara cuando se pulsa el boton Login
	public	void Login()
	{
		EtceteraBinding.showBezelActivityViewWithLabel("Conectando, un momento por favor");
		
		
		ParseUser.LogInAsync(loginUser2,loginPass2).ContinueWith(t=>
		{
			
			if (t.IsFaulted || t.IsCanceled)
			{
				
				StartCoroutine(WaitAlertView3());
				
			}
			
			
			else 
			{
				StartCoroutine(WaitAlertView4());
				
			}
			
		
		
		});
		
		
	}
	
	
	// Cuando el login se ha creado con exito cambiamos de escena
	public void NivelCargado ()
	{
		
		if (cargado)
		{
			
			
			Application.LoadLevel ("EscenadeJuego");
		}
		
	}
2

well it sounds more like you’re looking for a Invoke method with all the waiting to me, however if you want to start a coroutine from a different thread than the unity main thread, therefore you could create a list and add whatever the coroutine is supposed to do to it as for instance an action and invoke the action on a gameobject within the game loop (i use this kind of approach whenever i have network calls which are by nature asnchronious …

  1. create a gameobject in your scene and add a this script:

    public class DoOnMainThread : MonoBehaviour {

     public readonly static Queue<Action> ExecuteOnMainThread = new Queue<Action>();
 
 public virtual void Update()
 {
 	// dispatch stuff on main thread
 	while (ExecuteOnMainThread.Count > 0)
 	{
 		ExecuteOnMainThread.Dequeue().Invoke();
 	}
 }

    }

  2. Add your coroutine action into the queue whenever you want to call it like this:

    DoOnMainThread.ExecuteOnMainThread.Enqueue(() => { StartCoroutine(WaitAlertView4()); } );

it will be executed next opportunity the main thread can, or rather when the game object will call it’s update method