Temporary replace of PrimaryScrollController

 This issue would be solved first https://github.com/flutter/flutter/issues/64236

@@ -92,7 +92,7 @@ class PhotoShareBottomSheet extends StatelessWidget {
               appBar: appBar(context),
               body: CustomScrollView(
                 physics: ClampingScrollPhysics(),
-                primary: true,
+                  controller: ModalScrollController.of(context),
                 slivers: <Widget>[
                   SliverSafeArea(
                     bottom: false,

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ComplexModal extends StatelessWidget {
-
-
   const ComplexModal({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
-    final scrollController = PrimaryScrollController.of(context);
     return Material(
       child: WillPopScope(
         onWillPop: () async {
@@ -47,8 +45,7 @@ class ComplexModal extends StatelessWidget {
                   bottom: false,
                   child: ListView(
                     shrinkWrap: true,
-
-                    controller: scrollController,
+                    controller: ModalScrollController.of(context),
                     children: ListTile.divideTiles(
                       context: context,
                       tiles: List.generate(

@@ -9,7 +9,6 @@ class ModalInsideModal extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final scrollController = PrimaryScrollController.of(context);
     return Material(
         child: CupertinoPageScaffold(
       navigationBar: CupertinoNavigationBar(
@@ -19,7 +18,7 @@ class ModalInsideModal extends StatelessWidget {
         child: ListView(
           reverse: reverse,
           shrinkWrap: true,
-            controller: scrollController,
+          controller: ModalScrollController.of(context),
           physics: ClampingScrollPhysics(),
           children: ListTile.divideTiles(
               context: context,

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ModalWithNavigator extends StatelessWidget {
 
@@ -8,7 +9,6 @@ class ModalWithNavigator extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final scrollController = PrimaryScrollController.of(context);
     return Material(
         child: Navigator(
       onGenerateRoute: (_) => MaterialPageRoute(
@@ -20,7 +20,7 @@ class ModalWithNavigator extends StatelessWidget {
               bottom: false,
               child: ListView(
                 shrinkWrap: true,
-                controller: scrollController,
+                controller: ModalScrollController.of(context),
                 children: ListTile.divideTiles(
                   context: context,
                   tiles: List.generate(

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class NestedScrollModal extends StatelessWidget {
   const NestedScrollModal({Key key}) : super(key: key);
@@ -7,7 +8,6 @@ class NestedScrollModal extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final scrollController = PrimaryScrollController.of(context);
     return NestedScrollView(
       controller: ScrollController(),
       physics: ScrollPhysics(parent: PageScrollPhysics()),
@@ -23,7 +23,7 @@ class NestedScrollModal extends StatelessWidget {
         ];
       },
       body: ListView.builder(
-        controller: scrollController,
+        controller: ModalScrollController.of(context),
         itemBuilder: (context, index) {
           return Container(
             height: 100,

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ModalWithScroll extends StatelessWidget {
   const ModalWithScroll({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
-    final scrollController = PrimaryScrollController.of(context);
+  
     return Material(
       child: CupertinoPageScaffold(
         navigationBar: CupertinoNavigationBar(
@@ -15,7 +16,7 @@ class ModalWithScroll extends StatelessWidget {
           bottom: false,
           child: ListView(
             shrinkWrap: true,
-            controller: scrollController,
+            controller: ModalScrollController.of(context),
             children: ListTile.divideTiles(
               context: context,
               tiles: List.generate(

@@ -4,3 +4,4 @@ export 'src/material_with_modal_page_route.dart';
 export 'src/bottom_sheets/cupertino_bottom_sheet.dart';
 export 'src/bottom_sheets/material_bottom_sheet.dart';
 export 'src/bottom_sheets/bar_bottom_sheet.dart';
+export 'src/utils/modal_scroll_controller.dart';
\ No newline at end of file

@@ -10,7 +10,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter/widgets.dart';
-import 'package:modal_bottom_sheet/src/utils/primary_scroll_status_bar.dart';
+import 'package:modal_bottom_sheet/src/utils/scroll_to_top_status_bar.dart';
 
 import 'package:modal_bottom_sheet/src/utils/bottom_sheet_suspended_curve.dart';
 
@@ -282,7 +282,7 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
         return;
       }
 
-// Otherwise the calculate the velocity with a VelocityTracker
+      // Otherwise the calculate the velocity with a VelocityTracker
       if (_velocityTracker == null) {
         _velocityTracker = VelocityTracker();
         _startTime = DateTime.now();
@@ -385,7 +385,10 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
       child: RepaintBoundary(child: child),
     );
 
-    return PrimaryScrollStatusBarHandler(child: child);
+    return ScrollToTopStatusBarHandler(
+      child: child,
+      scrollController: _scrollController,
+    );
   }
 }
 

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/src/utils/modal_scroll_controller.dart';
 
 import '../modal_bottom_sheet.dart';
 
@@ -74,10 +75,10 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMediaQuery(context));
-
-    return PrimaryScrollController(
-      controller: PrimaryScrollController.of(context) ??
-          (_scrollController ??= ScrollController()),
+    final scrollController = PrimaryScrollController.of(context) ??
+          (_scrollController ??= ScrollController());
+    return ModalScrollController(
+      controller: scrollController,
       child: Builder(
         builder: (context) => AnimatedBuilder(
           animation: widget.route._animationController,
@@ -107,7 +108,7 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
                 child: child,
                 enableDrag: widget.enableDrag,
                 bounce: widget.bounce,
-                scrollController: PrimaryScrollController.of(context),
+                scrollController: scrollController,
                 animationCurve: widget.animationCurve,
               ),
             );

+import 'package:flutter/rendering.dart';
+import 'package:flutter/widgets.dart';
+
+/// Associates a [ScrollController] with a subtree.
+///
+/// This mechanism can be used to provide default behavior for scroll views in a
+/// subtree inside a modal bottom sheet.
+///
+/// We want to remove this and use [PrimaryScrollController].
+/// This issue should be solved first https://github.com/flutter/flutter/issues/64236
+///
+/// See [PrimaryScrollController]
+class ModalScrollController extends InheritedWidget {
+  /// Creates a widget that associates a [ScrollController] with a subtree.
+  ModalScrollController({
+    Key key,
+    @required this.controller,
+    @required Widget child,
+  })  : assert(controller != null),
+        super(
+          key: key,
+          child: PrimaryScrollController(
+            controller: controller,
+            child: child,
+          ),
+        );
+
+  /// The [ScrollController] associated with the subtree.
+  ///
+  /// See also:
+  ///
+  ///  * [ScrollView.controller], which discusses the purpose of specifying a
+  ///    scroll controller.
+  final ScrollController controller;
+
+  /// Returns the [ScrollController] most closely associated with the given
+  /// context.
+  ///
+  /// Returns null if there is no [ScrollController] associated with the given
+  /// context.
+  static ScrollController of(BuildContext context) {
+    final ModalScrollController result =
+        context.dependOnInheritedWidgetOfExactType<ModalScrollController>();
+    return result?.controller;
+  }
+
+  @override
+  bool updateShouldNotify(ModalScrollController oldWidget) =>
+      controller != oldWidget.controller;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<ScrollController>(
+        'controller', controller,
+        ifNull: 'no controller', showName: false));
+  }
+}

 import 'package:flutter/widgets.dart';
 
-/// Creates a primary scroll controller that will
-/// scroll to the top when tapped on the status bar
+/// Widget that that will scroll to the top the ScrollController
+/// when tapped on the status bar
 ///
-class PrimaryScrollStatusBarHandler extends StatefulWidget {
+class ScrollToTopStatusBarHandler extends StatefulWidget {
   final Widget child;
+  final ScrollController scrollController;
 
-  const PrimaryScrollStatusBarHandler({Key key, this.child}) : super(key: key);
+  const ScrollToTopStatusBarHandler({
+    Key key,
+    @required this.child,
+    @required this.scrollController,
+  }) : super(key: key);
 
   @override
-  _PrimaryScrollWidgetState createState() => _PrimaryScrollWidgetState();
+  _ScrollToTopStatusBarState createState() => _ScrollToTopStatusBarState();
 }
 
-class _PrimaryScrollWidgetState extends State<PrimaryScrollStatusBarHandler> {
+class _ScrollToTopStatusBarState extends State<ScrollToTopStatusBarHandler> {
   @override
   void initState() {
     super.initState();
@@ -43,7 +48,7 @@ class _PrimaryScrollWidgetState extends State<PrimaryScrollStatusBarHandler> {
   }
 
   void _handleStatusBarTap(BuildContext context) {
-    final controller = PrimaryScrollController.of(context);
+    final controller = widget.scrollController;
     if (controller != null && controller.hasClients) {
       controller.animateTo(
         0.0,