Unity3D UGUI生成并播放序列帧动画prefab

### Editor脚本自动生成Prefab
`SpriteAnimationInspector.cs`
```csharp
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEditor;
using UnityEngine;
using UnityEngine.UI;

namespace LuaFramework
{
    [CustomEditor(typeof(UGUISpriteAnimation))]
    public class SpriteAnimationInspector : Editor
    {
        private static string PREFAB_PATH = "Assets/Res/ViewEffects";
        private static string SPRITES_PATH = PREFAB_PATH+"/sprites";
        [MenuItem("Assets/Create/Sprite To Prefab _%&_u")]
        static void CreatToPrefab()
        {
            UnityEngine.Object[] selectedGameObjects = Selection.GetFiltered<UnityEngine.Object>(SelectionMode.Assets);
            if (selectedGameObjects.Length > 0)
            {
                CreatePrefab(selectedGameObjects[0].name);
            }
        }
        [MenuItem("Assets/Create/Sprite To Prefab _%&_u", true)]
        static bool CheckPrefabPath()
        {
            UnityEngine.Object[] selectedGameObjects = Selection.GetFiltered<UnityEngine.Object>(SelectionMode.Assets);
            if (selectedGameObjects.Length > 0)
            {
                string name = selectedGameObjects[0].name;
                string[] directoryEntries = System.IO.Directory.GetDirectories(SPRITES_PATH);
                for (int i = 0; i < directoryEntries.Length; i++)
                {
                    string path = directoryEntries[i];
                    path = path.Replace('\\','/');
                    if (path.EndsWith(name))
                    {
                        return true;
                    }
                }
            }
            return false;
        }
        static private void CreatePrefab(string prefabname)
        {

string createPath = PREFAB_PATH + "/" + prefabname + ".prefab";
            string searchPath = SPRITES_PATH + "/" + prefabname;
            Debug.Log("CreatPrefab : " + createPath);
            if (AssetDatabase.LoadAssetAtPath<GameObject>(createPath) == null)
            {
                GameObject prefab = new GameObject();
                prefab.name = prefabname;
                UGUISpriteAnimation comp = prefab.GetComponent<UGUISpriteAnimation>();
                if (comp == null)
                {
                    comp = prefab.AddComponent<UGUISpriteAnimation>();
                }
                comp.aniname = prefab.name;
                string[] names = GetSprites(searchPath);
                //Sprite[] sprites = AssetDatabase.LoadAllAssetsAtPath(selectPath).OfType<Sprite>().ToArray();
                for (int i = 0; i < names.Length; i++)
                {
                    string path = searchPath + "/" + names[i];
                    Sprite sprite = AssetDatabase.LoadAssetAtPath<Sprite>(path);
                    if (i == 0)
                    {
                        prefab.GetComponent<Image>().sprite = sprite;
                        prefab.GetComponent<Image>().SetNativeSize();
                    }
                    comp.SpriteFrames.Add(sprite);
                }
                PrefabUtility.CreatePrefab(PREFAB_PATH + "/" + prefab.name + ".prefab", prefab);
                DestroyImmediate(prefab);
                Refresh();
            }
            else
            {
                EditorUtility.DisplayDialog("错误！", "Prefab名字重复，请重命名！", "OK");
            }

}

void SetSprites()
        {
            if (spriteAnimation != null)
            {
                string searchPath = SPRITES_PATH + "/" + spriteAnimation.aniname;
                string[] names = GetSprites(searchPath);
                for (int i = 0; i < names.Length; i++)
                {
                    string path = searchPath + "/" + names[i];
                    Sprite sprite = AssetDatabase.LoadAssetAtPath<Sprite>(path);
                    if (i == 0)
                    {
                        spriteAnimation.GetComponent<Image>().sprite = sprite;
                        spriteAnimation.GetComponent<Image>().SetNativeSize();
                    }
                    spriteAnimation.SpriteFrames.Add(sprite);
                }
            }
            Refresh();
        }

void ClearSprites()
        {
            if (spriteAnimation != null)
            {
                spriteAnimation.SpriteFrames.Clear();
            }
            Refresh();
        }

static string AssetPath()
        {
            string path = Application.dataPath.Replace("/Assets", "");
            return path;
        }

static string[] GetSprites(string searchPath)
        {
            List<string> names = new List<string>();
            if (Directory.Exists(searchPath))
            {
                DirectoryInfo dirs = new DirectoryInfo(searchPath);
                FileInfo[] files = dirs.GetFiles();
                for (int i = 0; i < files.Length; i++)
                {
                    string filename = files[i].Name.ToLower();
                    if (filename.EndsWith(".jpg") || filename.EndsWith(".png"))
                    {
                        names.Add(files[i].Name);
                    }
                }
                names.Sort();
            }
            return names.ToArray();
        }
        static private void Refresh()
        {
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();
            EditorApplication.SaveScene();
        }

private UGUISpriteAnimation spriteAnimation;
        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();
            spriteAnimation = (UGUISpriteAnimation) target;
            GUILayout.Space(10);
            GUILayout.BeginHorizontal(GUI.skin.box);
            if (GUILayout.Button("Set Sprites"))
            {
                SetSprites();
            }
            if (GUILayout.Button("Clear Sprites"))
            {
                ClearSprites();
            }
            GUILayout.EndHorizontal();
        }
    }
}
```
### 序列帧播放控制脚本
`UGUISpriteAnimation.cs`
```csharp
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.Serialization;
using System;

namespace LuaFramework
{
    [RequireComponent(typeof(Image))]
    public class UGUISpriteAnimation : MonoBehaviour
    {
        [Serializable]
        public class CompleteEvent : UnityEvent { }
        [FormerlySerializedAs("onComplete")]
        [SerializeField]
        private CompleteEvent m_onComplete = new CompleteEvent();
        private Image ImageSource;
        private int mCurFrame = 0;
        private float mDelta = 0;
        public string aniname = "";
        public float FPS = 25;
        public List<Sprite> SpriteFrames = new List<Sprite>();
        public bool IsPlaying = false;
        public bool Foward = true;
        public bool AutoPlay = true;
        public bool Loop = true;
        public bool AutoDestory = false;

public CompleteEvent onComplete
        {
            get 
            { 
                return m_onComplete; 
            }
            set 
            { 
                m_onComplete = value;
            }
        }

public int FrameCount
        {
            get
            {
                return SpriteFrames.Count;
            }
        }

void Awake()
        {
            ImageSource = GetComponent<Image>();
        }

void Start()
        {
            if (AutoPlay)
            {
                Play();
            }
            else
            {
                IsPlaying = false;
            }
        }

private void SetSprite(int idx)
        {
            ImageSource.sprite = SpriteFrames[idx];
            ImageSource.SetNativeSize();
        }

public void Play()
        {
            IsPlaying = true;
            Foward = true;
        }

public void PlayReverse()
        {
            IsPlaying = true;
            Foward = false;
        }

void Update()
        {
            if (!IsPlaying || 0 == FrameCount)
            {
                return;
            }

mDelta += Time.deltaTime;
            if (mDelta > 1 / FPS)
            {
                mDelta = 0;
                if (Foward)
                {
                    mCurFrame++;
                }
                else
                {
                    mCurFrame--;
                }

if (mCurFrame >= FrameCount)
                {
                    if (Loop)
                    {
                        mCurFrame = 0;
                        m_onComplete.Invoke();
                    }
                    else
                    {
                        IsPlaying = false;
                        m_onComplete.Invoke();
                        if (AutoDestory)
                        {
                            Destroy(gameObject);
                        }
                        return;
                    }
                }
                else if (mCurFrame < 0)
                {
                    if (Loop)
                    {
                        mCurFrame = FrameCount - 1;
                    }
                    else
                    {
                        IsPlaying = false;
                        return;
                    }
                }

SetSprite(mCurFrame);
            }
        }

public void Pause()
        {
            IsPlaying = false;
        }

public void Resume()
        {
            if (!IsPlaying)
            {
                IsPlaying = true;
            }
        }

public void Stop()
        {
            mCurFrame = 0;
            SetSprite(mCurFrame);
            IsPlaying = false;
        }

public void Rewind()
        {
            mCurFrame = 0;
            SetSprite(mCurFrame);
            Play();
        }
    }
}

```

Unity3D UGUI生成并播放序列帧动画prefab

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