[游戏开发]Unity3d使用UGUI播放序列帧动画

功能如题，原理这里不做多余解释，直接上代码。

using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Image))]
public class UI2dAnimation : MonoBehaviour
{
    #region 字段
    #region Private
    private Image m_ImageSource = null;
    /// <summary>当前帧</summary>
    private int m_CurFrame = 0;
    /// <summary>计时</summary>
    private float m_Delta = 0;
    #endregion

    #region Public
    public Sprite[] SpriteFrames;
    /// <summary>帧率</summary>
    public float FPS = 5;
    /// <summary>是否正在运行</summary>
    public bool IsPlaying = false;
    /// <summary>正向</summary>
    public bool Foward = true;
    /// <summary>自动运行</summary>
    public bool AutoPlay = false;
    /// <summary>循环</summary>
    public bool Loop = true;
    #endregion
    #endregion

    /// <summary>帧数量</summary>
    public int FrameCount { get { return SpriteFrames.Length; } }

    #region Unity系统函数
    void Awake()
    {
        m_ImageSource = GetComponent<Image>();
    }
    void Start()
    {
        if (AutoPlay)
            Play();//自动运行
        else
            IsPlaying = false;
    }
    void Update()
    {
        if (!IsPlaying || 0 == FrameCount) return;//不运行
        m_Delta += Time.deltaTime;//计时
        if (m_Delta > 1 / FPS)
        {
            m_Delta = 0;
            if (Foward) m_CurFrame++;//正向播放
            else m_CurFrame--;//反向播放
            if (Loop)
            {//循环
                if (m_CurFrame >= FrameCount)
                {//正向播放
                    m_CurFrame = 0;
                }
                else if (m_CurFrame < 0)
                {//反向播放
                    m_CurFrame = FrameCount - 1;
                }
            }
            else
            {//播放一遍就停
                IsPlaying = false;
                return;
            }
            SetSprite(m_CurFrame);
        }
    }
    #endregion

    /// <summary>设置精灵summary>
    /// <param name="idx">精灵所以</param>
    private void SetSprite(int idx)
    {
        m_ImageSource.sprite = SpriteFrames[idx];
        //m_ImageSource.SetNativeSize();
    }

    #region Public
    /// <summary>运行</summary>
    public void Play()
    {
        IsPlaying = true;
        Foward = true;
    }
    /// <summary>运行倒放</summary>
    public void PlayReverse()
    {
        IsPlaying = true;
        Foward = false;
    }
    /// <summary>暂停</summary>
    public void Pause()
    {
        IsPlaying = false;
    }
    /// <summary>重新开始</summary>
    public void Resume()
    {
        if (!IsPlaying)
        {
            IsPlaying = true;
        }
    }
    /// <summary>停止</summary>
    public void Stop()
    {
        m_CurFrame = 0;
        SetSprite(m_CurFrame);
        IsPlaying = false;
    }
    /// <summary>倒带</summary>
    public void Rewind()
    {
        m_CurFrame = 0;
        SetSprite(m_CurFrame);
        Play();
    }
    #endregion
}