Unity是不识别Gif格式图的，需要我们使用c#将gif里多帧图转化为Texture2D格式。需要使用System.Drawing.dll.此dll在unity安装目录下就可以找到。由于unity没有gif格式的文件，所以我们无法在面板指定，需要动态加载。所以将gif图放在StreamingAssets文件夹下。以下为源代码：

using System;using System.Collections;using System.Collections.Generic;using System.Drawing;using System.Drawing.Imaging;using System.IO;using UnityEngine; public class PlayGif : MonoBehaviour { public UnityEngine.UI.Image Im; public string gifName = ""; public GameObject[] Ims; [SerializeField] private float fps = 5f; private List<Texture2D> tex2DList = new List<Texture2D>(); private float time; Bitmap mybitmp; void Start() { System.Drawing.Image image = System.Drawing.Image.FromFile(Application.streamingAssetsPath + "/"+gifName+".gif"); tex2DList = MyGif(image); } // Update is called once per frame void Update() { if (tex2DList.Count > 0) { time += Time.deltaTime; int index = (int)(time * fps) % tex2DList.Count; if (Im != null) { Im.sprite = Sprite.Create(tex2DList[index], new Rect(0, 0, tex2DList[index].width, tex2DList[index].height), new Vector2(0.5f, 0.5f)); } if (Ims.Length != 0) { for (int i = 0; i < Ims.Length; i++) Ims[i].GetComponent<Renderer>().material.mainTexture = tex2DList[index]; } } } private List<Texture2D> MyGif(System.Drawing.Image image) { List<Texture2D> tex = new List<Texture2D>(); if (image != null) { //Debug.Log("图片张数：" + image.FrameDimensionsList.Length); FrameDimension frame = new FrameDimension(image.FrameDimensionsList[0]); int framCount = image.GetFrameCount(frame);//获取维度帧数 for (int i = 0; i < framCount; ++i) { image.SelectActiveFrame(frame, i); Bitmap framBitmap = new Bitmap(image.Width, image.Height); using (System.Drawing.Graphics graphic = System.Drawing.Graphics.FromImage(framBitmap)) { graphic.DrawImage(image, Point.Empty); } Texture2D frameTexture2D = new Texture2D(framBitmap.Width, framBitmap.Height, TextureFormat.ARGB32, true); frameTexture2D.LoadImage(Bitmap2Byte(framBitmap)); tex.Add(frameTexture2D); } } return tex; } private byte[] Bitmap2Byte(Bitmap bitmap) { using (MemoryStream stream = new MemoryStream()) { // 将bitmap 以png格式保存到流中 bitmap.Save(stream, ImageFormat.Png); // 创建一个字节数组，长度为流的长度 byte[] data = new byte[stream.Length]; // 重置指针 stream.Seek(0, SeekOrigin.Begin); // 从流读取字节块存入data中 stream.Read(data, 0, Convert.ToInt32(stream.Length)); return data; } }}

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