ArgumentException: method return type is incompatible

Questions & Answers
1

So I am using the Unity 4.6 UI Buttons when this error came up:

ArgumentException: method return type is incompatible
System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, Boolean throwOnBindFailure) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System/Delegate.cs:190)
System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System/Delegate.cs:276)
UnityEngine.Events.InvokableCall…ctor (System.Object target, System.Reflection.MethodInfo theFunction) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:98)
UnityEngine.Events.PersistentCall.GetRuntimeCall (UnityEngine.Events.UnityEventBase theEvent) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:355)
UnityEngine.Events.PersistentCallGroup.Initialize (UnityEngine.Events.InvokableCallList invokableList, UnityEngine.Events.UnityEventBase unityEventBase) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:517)
UnityEngine.Events.UnityEventBase.RebuildPersistentCallsIfNeeded () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:673)
UnityEngine.Events.UnityEventBase.Invoke (System.Object parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:709)
UnityEngine.Events.UnityEvent.Invoke () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent_0.cs:53)
UnityEngine.UI.Button.Press () (at C:/buildslave/unity/build/Extensions/guisystem/guisystem/UI/Core/Button.cs:35)
UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/guisystem/UI/Core/Button.cs:44)
UnityEngine.EventSystems.ExecuteEvents.Execute (IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/guisystem/EventSystem/ExecuteEvents.cs:52)
UnityEngine.EventSystems.ExecuteEvents.Execute[IPointerClickHandler] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) (at C:/buildslave/unity/build/Extensions/guisystem/guisystem/EventSystem/ExecuteEvents.cs:269)
UnityEngine.EventSystems.EventSystem:Update()

Here’s my Script:

#pragma strict

var login : GameObject;
var create : GameObject;
var f : float;
var i : int = 0;
private var swipe : boolean = true;

function Update ()
{
	if (i > 0)
	{
		swipe = true;
		var b : GameObject = gameObject.FindGameObjectWithTag("B2");
		b.GetComponent(UI.Button).interactable = true;
	}
	if (i == 0)
	{
		var b2 : GameObject = gameObject.FindGameObjectWithTag("B2");
		b2.GetComponent(UI.Button).interactable = false;
	}
	if (i <= -1)
	{
		swipe = false;
	}
}

function LoginToForgot () 
{
	iTween.MoveTo(login,Vector3(-15,0,0),1);
	iTween.MoveTo(create,Vector3(0,0,0),1);
}

function ForgotToLogin ()
{
	iTween.MoveTo(login,Vector3(0,0,0),1);
	iTween.MoveTo(create,Vector3(15,0,0),1);
}

function SkateparksRight ()
{
	if (swipe == true)
	{
		i++;
		swipe = false;
		var alga : GameObject = gameObject.FindGameObjectWithTag("AlgaTest");
		var aura : GameObject = gameObject.FindGameObjectWithTag("AuraTest");
		var cbp : GameObject = gameObject.FindGameObjectWithTag("CBPTest");
		iTween.MoveTo(alga,Vector3(alga.transform.position.x - f,alga.transform.position.y,alga.transform.position.z),1);
		iTween.MoveTo(aura,Vector3(aura.transform.position.x - f,aura.transform.position.y,aura.transform.position.z),1);
		iTween.MoveTo(cbp,Vector3(cbp.transform.position.x - f,cbp.transform.position.y,cbp.transform.position.z),1);
		yield WaitForSeconds (1);
		swipe = true;
	}
}

function SkateparksLeft ()
{
	if (swipe == true)
	{
		i--;
		swipe = false;
		var alga : GameObject = gameObject.FindGameObjectWithTag("AlgaTest");
		var aura : GameObject = gameObject.FindGameObjectWithTag("AuraTest");
		var cbp : GameObject = gameObject.FindGameObjectWithTag("CBPTest");
		iTween.MoveTo(alga,Vector3(alga.transform.position.x + f,alga.transform.position.y,alga.transform.position.z),1);
		iTween.MoveTo(aura,Vector3(aura.transform.position.x + f,aura.transform.position.y,aura.transform.position.z),1);
		iTween.MoveTo(cbp,Vector3(cbp.transform.position.x + f,cbp.transform.position.y,cbp.transform.position.z),1);
		yield WaitForSeconds (1);
		swipe = true;
	}
}

function AfterSubmission ()
{
	var logIn : GameObject = gameObject.FindGameObjectWithTag("LogIn");
	var createAccount : GameObject = gameObject.FindGameObjectWithTag("CreateAccount");
	var skateparks : GameObject = gameObject.FindGameObjectWithTag("Skateparks");
	iTween.MoveTo(logIn,Vector3(0,20,0),1);
	iTween.MoveTo(createAccount,Vector3(15,20,0),1);
	iTween.MoveTo(skateparks,Vector3(0,0.4,-0.01),1);
}

function SignOut ()
{
	var logIn : GameObject = gameObject.FindGameObjectWithTag("LogIn");
	var createAccount : GameObject = gameObject.FindGameObjectWithTag("CreateAccount");
	var skateparks : GameObject = gameObject.FindGameObjectWithTag("Skateparks");
	iTween.MoveTo(logIn,Vector3(0,0,0),1);
	iTween.MoveTo(createAccount,Vector3(15,0,0),1);
	iTween.MoveTo(skateparks,Vector3(0,-20,-0.01),1);
}

Thanks!

2

This happened to me too. I got rid of the message by making sure my onscreen input was set to an int rather than a float.
I had a variable (float) that was fed by the keyboard arrow keys or joystick input. I tried to have my onscreen buttons input a float as well for left and right: -.99 and .99. This didn’t work.

Had to set that variable to an int with -1 and 1 to make it work. It’s OK to not have the float for the keyboard and joystick since this ended up being the code just for an android version.