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我正在使用 StickyGroupedListView 按日期（特别是按周）分隔列表视图项。

滚动时，当分隔符从底部出现时，它会随机崩溃，但我不太明白。

如果重要的话，该列表有大约 25 项。

我对 Flutter 很陌生，所以如果代码混乱，我很抱歉。

StickyGroupedListView的代码：

StickyGroupedListView<TransactionData, DateTime>(
      elements: transactions,
      order: StickyGroupedListOrder.ASC,
      groupBy: (TransactionData transaction) =>
          getStartOfWeek(transaction.date),
      groupComparator: (DateTime value1, DateTime value2) =>
          value2.compareTo(value1),
      floatingHeader: true,
      groupSeparatorBuilder: (TransactionData transaction) => Container(
        height: 50,
        margin: EdgeInsets.all(8),
        child: Align(
          alignment: Alignment.center,
          child: Container(
            width: 300,
            decoration: BoxDecoration(
              color: Color(0xff3447d4),
              borderRadius: BorderRadius.all(Radius.circular(18.0)),
            ),
            child: Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text(
                '${getStartOfWeek(transaction.date).day}. ${getStartOfWeek(transaction.date).month}. ${getStartOfWeek(transaction.date).year}',
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 20,
                  color: Colors.white,
                ),
              ),
            ),
          ),
        ),
      ),
      itemBuilder: (_, TransactionData transaction) {
        return Container(
          margin: EdgeInsets.symmetric(horizontal: 25, vertical: 10),
          child: Card(
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(12),
            ),
            elevation: 6,
            child: InkWell(
              onTap: () {},
              borderRadius: BorderRadius.circular(12),
              child: Padding(
                padding:
                    const EdgeInsets.symmetric(vertical: 10, horizontal: 15),
                child: Row(
                  children: <Widget>[
                    Image.asset(setImage(transaction.buy)),
                    SizedBox(width: 10),
                    Column(
                      mainAxisAlignment: MainAxisAlignment.start,
                      children: [
                        Text(
                          getTransactionTitle(transaction),
                          style: TextStyle(
                            color: Colors.black,
                            fontSize: 25.0,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                        Text(
                          DateFormat('dd.MM.yyyy').format(transaction.date),
                          style: TextStyle(
                            fontSize: 20.0,
                            color: Colors.grey.withOpacity(0.8),
                          ),
                        ),
                      ],
                    ),
                    Spacer(),
                    getTransactionAmountWidget(transaction), //function to return Widget based on transaction type
                  ],
                ),
              ),
            ),
          ),
        );
      },
    );

例外：

Assertion failed: org-dartlang-sdk:///flutter_web_sdk/lib/_engine/engine/html/picture.dart:54:10
canvas == null || !_recycledCanvases.contains(canvas)
is not true

When the exception was thrown, this was the stack: 
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 231:49  throw_
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 24:3    assertFailed
C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/html/picture.dart 54:62                    _recycleCanvas
C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/html/picture.dart 591:5                    discard
C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/html/surface.dart 802:14                   _discardActiveChildren
...
====================================================================================================

======== Exception caught by scheduler library =====================================================
PersistedPhysicalShape: is in an unexpected state.
Expected one of: PersistedSurfaceState.active, PersistedSurfaceState.released
But was: PersistedSurfaceState.pendingRetention
====================================================================================================

最后一个例外被多次列出。

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0 回答 0