feat(ios):修改iOS照片请求权限

lib/upload_image/down_load_image_tool.dart

@@ -15,8 +15,8 @@ class DownLoadImageTool {
   // 请求照片库权限
   static Future<bool> requestPhotoPermission() async {
     // 检查当前权限状态
-    var status = await Permission.photos.status;
-
+    // var status = await Permission.photos.status;
+    var status = await Permission.storage.request();
     if (status.isDenied) {
       // 请求权限
       status = await Permission.photos.request();