Unity Standalone File Browser，Unity打开文件选择器

下载地址：GitHub链接：

https://github.com/gkngkc/UnityStandaloneFileBrowser

简单的示例代码

using SFB;
using System;
using System.IO;
using UnityEngine;
using UnityEngine.UI;

public class NewBehaviourScript : MonoBehaviour
{
   /// <summary>
   /// 用于显示图片的image
   /// </summary>
   public Image myimage;

   /// <summary>
   /// 图片选择按钮
   /// </summary>
   public Button btnSelect;

   /// <summary>
   /// 图片读取按钮
   /// </summary>
   public Button btnRead;

   private void Start()
   {
       btnSelect.onClick.AddListener(OnSelectImageButtonClicked);
       btnRead.onClick.AddListener(LoadAndDisplayBase64Image);
   }

   public void OnSelectImageButtonClicked()
   {

       //        // Open file with filter
       //        var extensions = new[] {
       //    new ExtensionFilter("Image Files", "png", "jpg", "jpeg" ),
       //    new ExtensionFilter("Sound Files", "mp3", "wav" ),
       //    new ExtensionFilter("All Files", "*" ),
       //};


       // Open file with filter
       var extensions = new[] {
   new ExtensionFilter("Image Files", "png", "jpg", "jpeg" )};


       string[] paths = StandaloneFileBrowser.OpenFilePanel("Select Image", "", extensions, false);

       if (paths.Length > 0)
       {
           string imagePath = paths[0];
           byte[] imageData = File.ReadAllBytes(imagePath);

           // 将图像数据转换为Base64字符串
           string base64ImageString = Convert.ToBase64String(imageData);

           // 将Base64字符串写入文本文件
           File.WriteAllText(Application.streamingAssetsPath + "/image_data.txt", base64ImageString);
       }
   }

   public void LoadAndDisplayBase64Image()
   {
       if (File.Exists(Application.streamingAssetsPath + "/image_data.txt"))
       {
           // 从文件读取Base64字符串
           string base64ImageString = File.ReadAllText(Application.streamingAssetsPath + "/image_data.txt");

           // 将Base64字符串解码回字节数组
           byte[] imageData = Convert.FromBase64String(base64ImageString);

           // 创建Texture2D并加载图像数据
           Texture2D texture = new Texture2D(100, 100);
           texture.LoadImage(imageData);

           // 将Texture2D转换为Sprite并设置到Image组件上
           myimage.sprite = CreateSpriteFromTexture(texture);
       }
   }

   private Sprite CreateSpriteFromTexture(Texture2D texture)
   {
       Rect rect = new Rect(0, 0, texture.width, texture.height);
       Vector2 pivot = new Vector2(0.5f, 0.5f);
       return Sprite.Create(texture, rect, pivot);
   }
}

场景布局

代码解析：
引用命名空间： using SFB;
两个按钮实现功能，一个image用于显示图片

        // Open file with filter
        var extensions = new[] {
    new ExtensionFilter("Image Files", "png", "jpg", "jpeg" )};

添加过滤条件，效果如下图，在右下角

多条件过滤，

        // Open file with filter
        var extensions = new[] {
            new ExtensionFilter("Image Files", "png", "jpg", "jpeg" ),
            new ExtensionFilter("Sound Files", "mp3", "wav" ),
            new ExtensionFilter("All Files", "*" ),
        };

效果在右下角

选择完毕之后，点击读取按钮会读取上面写如的base64文件，将图片显示到场景中