ios选择图片功能，结果列表扩大

Assets/Scripts/Mobile/ImageSelectorController.cs

@@ -6,16 +6,23 @@ using UnityEngine;
 public class ImageSelectorController
 {
     private AndroidJavaObject mainActivityObject = null;
-
+#if UNITY_IOS
+    [DllImport("__Internal")]
+    private static extern void IOS_OpenCamera();
+    [DllImport("__Internal")]
+    private static extern void IOS_OpenAlbum();
+#endif
     private static ImageSelectorController _instance;
     public static ImageSelectorController Instance
     {
         get
         {
+#if !UNITY_EDITOR
             if (_instance == null)
             {
                 _instance = new ImageSelectorController();
             }
+#endif
             return _instance;
         }
     }
@@ -30,6 +37,10 @@ public class ImageSelectorController
     }
     public void Select() 
     {
+#if UNITY_IOS
+        IOS_OpenAlbum();
+#else
         mainActivityObject.Call("Select");
+#endif
     }
 }