//精灵渲染器
private SpriteRenderer mRenderer;
//精灵集合
public Sprite[] Sprites;
//FPS,即每秒钟的画面帧数
public float FPS = 24;
//精灵索引
private int index = 0;
//当前时间
private float currentTime = 0;

void Start () 
{
    mRenderer = GetComponent<SpriteRenderer>();
}
	
void Update () 
{
    //获取当前时间
    currentTime += Time.deltaTime;
    //如果达到了更新画面的时间
    if(currentTime >= 1 / FPS)
    {
        //使索引增加
        index += 1;
        //清除时间记录
        currentTime = 0;
        //当索引更新到最后一帧时,索引重置
        if(index >= Sprites.Length)
        {
            index = 0;
        }
    }

    //更新画面
    mRenderer.sprite = Sprites[index];
}

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {

    public enum PlayerState
    {
        Idle,
        Move,
        LightAttack,
        WeightAttack
    }

    public PlayerState State=PlayerState.Idle;
    //玩家移动速度
    public float WalkSpeed = 0.75f;
    public float RunSpeed = 1.5f;
    //玩家跳跃力的强度
    public float JumpForce = 200f;

    //位置限制
    public float MinX = -5.80f;
    public float MaxX =  5.80f;
    public float MinY = -1.80f;
    public float MaxY =  0.35f;

    //玩家朝向，默认朝右
    public bool isFaceRight = true;

    //动画组件
    private Animator mAnim;
    //2D刚体
    private Rigidbody2D mRig2D;


    void Start () 
    {
        mAnim=GetComponent<Animator>();
        mRig2D=GetComponent<Rigidbody2D>();
    }

    void Update()
    {
        SpriteMove();
        SpriteAttack();
        SpriteJump();
        SpriteIdle();
    }

    /// <summary>
    /// 精灵Idle
    /// </summary>
    private void SpriteIdle()
    {
        //当玩家无任何操作时恢复到Idle状态
        if (!Input.anyKey)
        {
            mAnim.SetBool("Jump", false);
            mAnim.SetBool("Attack", false);
            mAnim.SetBool("BigAttack", false);
            mAnim.SetBool("Skill", false);
            mAnim.SetBool("BigSkill", false);
            State=PlayerState.Idle;
        }
    }

    /// <summary>
    /// 精灵攻击
    /// </summary>
    private void SpriteAttack()
    {
        //轻击，键位J
        if(Input.GetKey(KeyCode.J))
        {
            mAnim.SetBool("Attack", true);
            State=PlayerState.LightAttack;
        }

        //重击，键位K
        if(Input.GetKey(KeyCode.K))
        {
            mAnim.SetBool("BigAttack", true);
            State=PlayerState.WeightAttack;
        }

    }

    /// <summary>
    /// 精灵跳跃
    /// </summary>
    private void SpriteJump()
    {
        if (Input.GetKey(KeyCode.I))
        {
            mAnim.SetBool("Jump", true);
            mRig2D.AddForce(new Vector2(0, Time.deltaTime * JumpForce), ForceMode2D.Impulse);
        }
    }

    private void SpriteMove()
    {
        float h = Input.GetAxis("Horizontal");
        float v = Input.GetAxis("Vertical");

        Vector2 mPos = mRig2D.position;

        mAnim.SetFloat("Speed", Mathf.Sqrt(h * h + v * v));

        float mPosX, mPosY;

        if (Mathf.Sqrt(h * h + v * v) > 0.5f){
            mPosX = mPos.x + h * Time.deltaTime * RunSpeed;
            mPosY = mPos.y + v * Time.deltaTime * RunSpeed;
        }else{
            mPosX = mPos.x + h * Time.deltaTime * WalkSpeed;
            mPosY = mPos.y + v * Time.deltaTime * WalkSpeed;
        }


        mRig2D.MovePosition(new Vector2(mPosX, mPosY));

        if (h > 0 && !isFaceRight)
        {
            FlipSrite();
        }
        else if (h < 0 && isFaceRight)
        {
            FlipSrite();
        }
    }


    void FlipSrite()
    {
        if(isFaceRight){
            transform.rotation=Quaternion.Euler(0,180,0);
            isFaceRight=false;
        }else{
            transform.rotation=Quaternion.Euler(0,0,0);
            isFaceRight=true;
        }
    }
}