Unity3D实现播放gif图功能

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;
   }
 }
}

来源：https://blog.csdn.net/qq_33994566/article/details/86534969