Check if a state exist in mecanim's AnimatorController

Questions & Answers
1

I need a API or a walk-around like this

**bool Animator::Exist(String stateName, int layerId);**

I know I can use try-catch on animator.Play(stateName, layerId) call, but I hate that.

Any idea?

2

This as an extension method:

using System.Collections;
using UnityEngine;

public static class Extensions
{
	public static bool StateExists( this Animator animator, int stateId, int layerId = 0 )
	{
		bool stateExists = false;
		
		UnityEditorInternal.AnimatorController ac = animator.runtimeAnimatorController as UnityEditorInternal.AnimatorController;
		UnityEditorInternal.StateMachine stateMachines = ac.GetLayer(layerId).stateMachine;
		for ( int i = 0; stateMachines != null && i < stateMachines.stateMachineCount; ++i )
		{
			UnityEditorInternal.StateMachine sm = stateMachines.GetStateMachine(i);
			if ( sm != null && sm.stateCount != 0 )
			{
				for ( int s = 0; s < sm.stateCount; ++s )
				{
					UnityEditorInternal.State state = sm.GetState(s);
					
					if ( state.uniqueNameHash == stateId )
					{
						stateExists = true;
						break;
					}
				}
			}
		}
		return stateExists;
	}

	public static bool StateExists( this Animator animator, string stateName, int layerId = 0 )
	{
		return animator.StateExists( Animator.StringToHash(stateName), layerId );
	}
}

Unfortunately, this code only compiles in the Editor, not at runtime (Player).