1、修复上传图片，关闭底部弹框时，跳转相册问题；

lib/widget/complaint_web_view.dart

@@ -137,7 +137,7 @@ class _ComplaintWebPageState extends State<ComplaintWebPage> {
 
   /// 选择图片底部弹框
   Future<List<String>> _showImagePicker(context) async {
-    ImageSource source = ImageSource.gallery;
+    ImageSource? source;
     await showModalBottomSheet(
       backgroundColor: Colors.transparent,
       isScrollControlled: true,
@@ -150,7 +150,9 @@ class _ComplaintWebPageState extends State<ComplaintWebPage> {
         });
       },
     );
-    var list = await _convertImagePicker(source);
+    debugPrint("source-->$source");
+    if (source == null) return [];
+    var list = await _convertImagePicker(source!);
     return list;
   }