聊聊Unity自定义组件之序列帧播放组件问题

/***********************************
*    Description：描述这是一个图片序列帧播放脚本，
*    Mountpoint：挂载点将其挂载在Image组件上
*    Date：2019.07.11
*    Version：unity版本2017.2.0f3
*    Author：LJF
***********************************/
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using LjfLog;
using UnityEngine.Events;
namespace LJF
{
    //规范命名、添加注释、合理封装、限制访问权限、异常处理    
    public class ImageAnimation : MonoBehaviour
    {
        public enum State
        {
            idle,
            playing,
            pause
        }
        public enum State1
        {
            once,
            loop
        }
       
        [Header("播放方式(循环、单次)")]//默认单次
        public State1 condition=State1.once;
        [Header("自动播放")]//默认不自动播放
        public bool Play_Awake = false;
        //播放状态(默认、播放中、暂停)
        private  State play_state;
        private Image manimg;
        [Header("每秒播放的帧数(整数)")]
        public float frame_number=30;
        [Header("sprite数组")]
        public Sprite[] sprit_arr;
        //回调事件
        public UnityEvent onCompleteEvent;
        private int index;
        private float tim;
        private float waittim;
        private bool isplay;
        void Awake()
        {
            manimg = GetComponent<Image>();
            tim = 0;
            index = 0;
            waittim = 1 / frame_number;
            play_state = State.idle;
            isplay = false;
            if (manimg == null)
            {
                Debuger.LogWarning("Image为空，请添加Image组件！！！");
                return;
            }
            if (sprit_arr.Length<1)
            {
                Debuger.LogWarning("sprite数组为0，请给sprite数组添加元素！！！");
            }
            manimg.sprite = sprit_arr[0];
            if (Play_Awake)
            {
                Play();
            }
        }
        void Update()
        {
            //测试
            if (Input.GetKeyDown(KeyCode.A))
            {
                Play();
            }
            if (Input.GetKeyDown(KeyCode.S))
            {
                Replay();
            }
            if (Input.GetKeyDown(KeyCode.D))
            {
                Stop();
            }
            if (Input.GetKeyDown(KeyCode.P))
            {
                Pause();
            }
            UpMove();
           
        }
        private void UpMove()
        {
            //单播
            if (condition == State1.once)
            {
                if (play_state == State.idle && isplay)
                {
                    play_state = State.playing;
                    index = 0;
                    tim = 0;
                }
                if (play_state == State.pause && isplay)
                {
                    play_state = State.playing;
                    tim = 0;
                }
                if (play_state == State.playing && isplay)
                {
                    tim += Time.deltaTime;
                    if (tim >= waittim)
                    {
                        tim = 0;
                        index++;
                        if (index >= sprit_arr.Length)
                        {
                            index = 0;
                            manimg.sprite = sprit_arr[index];
                            isplay = false;
                            play_state = State.idle;
                            //此处可添加结束回调函数
                            if (onCompleteEvent != null)
                            {
                                onCompleteEvent.Invoke();
                                return;
                            }
                        }
                        manimg.sprite = sprit_arr[index];
                    }
                }
            }
            //循环播放
            if (condition == State1.loop)
            {
                if (play_state == State.idle && isplay)
                {
                    play_state = State.playing;
                    index = 0;
                    tim = 0;
                }
                if (play_state == State.pause && isplay)
                {
                    play_state = State.playing;
                    tim = 0;
                }
                if (play_state == State.playing && isplay)
                {
                    tim += Time.deltaTime;
                    if (tim >= waittim)
                    {
                        tim = 0;
                        index++;
                        if (index >= sprit_arr.Length)
                        {
                            index = 0;
                            //此处可添加结束回调函数
                        }
                        manimg.sprite = sprit_arr[index];
                    }
                }
            }
        }
        /// <summary>
        /// 播放
        /// </summary>
        public void Play()
        {
            isplay = true;
        }
        /// <summary>
        /// 暂停
        /// </summary>
        public void Pause()
        {
            isplay = false;
            play_state = State.pause;
        }
        /// <summary>
        /// 停止
        /// </summary>
        public void Stop()
        {
            isplay = false;
            play_state = State.idle;
            index = 0;
            tim = 0;
            if (manimg == null)
            {
                Debuger.LogWarning("Image为空，请赋值");
                return;
            }
            manimg.sprite = sprit_arr[index];
        }
        /// <summary>
        /// 重播
        /// </summary>
        public void Replay()
        {
            isplay = true;
            play_state = State.playing;
            index = 0;
            tim = 0;
        }
    }
}