fix(ui): 下拉刷新刷新期间冻结下拉位移

lib/core/widgets/app_pull_to_refresh.dart

@@ -9,7 +9,6 @@ import '../theme/app_colors.dart';
 
 const double _maxPullDistance = 96;
 const double _refreshThreshold = 56;
-const double _holdDistance = 56;
 const double _indicatorHeight = 56;
 const double _indicatorMaxOffset = 10;
 const Duration _arrowTurnDuration = Duration(milliseconds: 160);
@@ -42,6 +41,7 @@ class _AppPullToRefreshState extends State<AppPullToRefresh>
   late final AnimationController _offsetController;
   _PullState _state = _PullState.idle;
   bool _refreshing = false;
+  bool _retracting = false;
 
   @override
   void initState() {
@@ -60,7 +60,7 @@ class _AppPullToRefreshState extends State<AppPullToRefresh>
   }
 
   bool _onScroll(ScrollNotification notification) {
-    if (notification.depth != 0 || _refreshing) return false;
+    if (notification.depth != 0 || _refreshing || _retracting) return false;
     if (notification is ScrollStartNotification) {
       if (notification.dragDetails != null) _setPullDistance(0);
     } else if (notification is ScrollUpdateNotification) {
@@ -91,24 +91,31 @@ class _AppPullToRefreshState extends State<AppPullToRefresh>
   }
 
   void _release() {
-    if (_refreshing) return;
+    if (_refreshing || _retracting) return;
     if (_state == _PullState.armed) {
       unawaited(_refresh());
     } else if (_state == _PullState.pull) {
-      _offsetController.value = 0;
-      setState(() {
-        _state = _PullState.idle;
-      });
+      unawaited(_retract());
     }
   }
 
+  Future<void> _retract() async {
+    if (_retracting) return;
+    _retracting = true;
+    await _animateOffsetTo(0);
+    if (!mounted) return;
+    setState(() {
+      _state = _PullState.idle;
+      _retracting = false;
+    });
+  }
+
   Future<void> _refresh() async {
     if (_refreshing) return;
     _refreshing = true;
     setState(() => _state = _PullState.refreshing);
     final refreshFuture = Future<void>.sync(widget.onRefresh);
     try {
-      await _animateOffsetTo(_holdDistance);
       await refreshFuture;
     } finally {
       if (mounted) {
@@ -152,7 +159,10 @@ class _AppPullToRefreshState extends State<AppPullToRefresh>
               Transform.translate(
                 key: const Key('pull-refresh-content'),
                 offset: Offset(0, offset),
-                child: IgnorePointer(ignoring: _refreshing, child: child),
+                child: IgnorePointer(
+                  ignoring: _refreshing || _retracting,
+                  child: child,
+                ),
               ),
               if (_state != _PullState.idle && offset > 0)
                 Positioned(