Unity --- 设置选择的图片的格式

 static void Setting(string assetPath, int maxSize, TextureImporterFormat androidFormat, TextureImporterFormat iosFormat)

 {

     var texImporter = AssetImporter.GetAtPath(assetPath) as TextureImporter;

     {

         texImporter.npotScale = TextureImporterNPOTScale.ToNearest;

         texImporter.isReadable = false;

         texImporter.mipmapEnabled = false;

         texImporter.alphaIsTransparency = true;

         texImporter.wrapMode = TextureWrapMode.Clamp;

         texImporter.filterMode = FilterMode.Bilinear;

         texImporter.anisoLevel = ;    //纹理的各向异性滤波水平

         texImporter.SetPlatformTextureSettings("Android", maxSize, androidFormat);

         texImporter.SetPlatformTextureSettings("iPhone", maxSize, iosFormat);

         texImporter.SetPlatformTextureSettings("Standalone", maxSize, TextureImporterFormat.ARGB32);

     }

     AssetDatabase.ImportAsset(assetPath);

     AssetDatabase.SaveAssets();

 }