通过AnimatorController更改其中某个动画片断的速度

using UnityEngine;  
using System.Collections;  
using UnityEditor.Animations;  
  
public class NewBehaviourScript : MonoBehaviour {  
  
    public  AnimatorController AC;   
    private float speed = 2f;   
    void IfNeedChangeSpeed ()   
    {   
         
        AC.layers [0].stateMachine.states [0].state.speed = 5;   
        for (int i = 0; i < AC.layers [0].stateMachine.states.Length; i++) {   
            Debug.Log (AC.layers [0].stateMachine.states .state.name == "指定的动画名");   
            if (AC.layers [0].stateMachine.states .state.name == "指定的动画名") {   
                AC.layers [0].stateMachine.states .state.speed = speed;   
            }   
        }   
    }   
}