AnimationClip.length

public float length ;

Description

动画长度，单位为秒。（只读）

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Animation anim;
    IEnumerator Start() {
        anim = GetComponent<Animation>();
        anim.Play();
        yield return new WaitForSeconds(anim.clip.length);
    }
}