Flutter如何引起一个新的手势

Question

我有一个可滑动的列表视图我想要一个长按手势来激活一个可滑动的动作。我可以收到一条长按消息，但我不知道该怎么做才能使滑动动作起作用。这是我需要编辑的自定义 Tile Widget。

这是我滑动时的样子。
我希望在释放长按时发生同样的事情

代码如下：

class BookmarkListTile extends StatelessWidget {
  // final BookmarkPageViewModel bookmarkViewmodel;
  // final int index;

  const BookmarkListTile(
      {Key? key, required this.bookmark, this.onTap, this.onDelete})
      : super(key: key);
  final Bookmark bookmark;
  final Function(Bookmark bookmark)? onDelete;
  final Function(Bookmark bookmark)? onTap;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
        behavior: HitTestBehavior.translucent,
        onLongPressUp: () {
          print("longpress");
          // add code here to cause the Slidable Action to happen

        },
        child: Slidable(
          actionPane: const SlidableDrawerActionPane(),
          secondaryActions: [
            IconSlideAction(
              icon: Icons.delete,
              color: Colors.red,
              onTap: () {
                if (onDelete != null) onDelete!(bookmark);
              },
            )
          ],
          child: ListTile(
            onTap: () {
              if (onTap != null) onTap!(bookmark);
            },
            title: Text(bookmark.note),
            subtitle: Text(PaliScript.getScriptOf(
                language:
                    context.read<ScriptLanguageProvider>().currentLanguage,
                romanText: bookmark.bookName!)),
            trailing: SizedBox(
              width: 100,
              child: Row(
                children: [
                  Text('${AppLocalizations.of(context)!.page} -'),
                  Expanded(
                      child: Text(
                    '${bookmark.pageNumber}',
                    textAlign: TextAlign.end,
                  )),
                ],
              ),
            ),
          ),
        ));
  }
}

Answer 1

试试这个：

Widget build(BuildContext context) {
    return Slidable(
          actionPane: const SlidableDrawerActionPane(),
          secondaryActions: [
            IconSlideAction(
              icon: Icons.delete,
              color: Colors.red,
              onTap: () {
                if (onDelete != null) onDelete!(bookmark);
              },
            )
          ],
          child: Builder(builder: (context) =>
             GestureDetector(
        behavior: HitTestBehavior.translucent,
        onLongPress: () {
         openSlidable(context);
        },
       child: ListTile(
            onTap: () {
              if (onTap != null) onTap!(bookmark);
            },
            title: Text(bookmark.note),
            subtitle: Text(PaliScript.getScriptOf(
                language:
                    context.read<ScriptLanguageProvider>().currentLanguage,
                romanText: bookmark.bookName!)),
            trailing: SizedBox(
              width: 100,
              child: Row(
                children: [
                  Text('${AppLocalizations.of(context)!.page} -'),
                  Expanded(
                      child: Text(
                    '${bookmark.pageNumber}',
                    textAlign: TextAlign.end,
                  )),
                ],
              ),
          ),
        ))));
  }


 void openSlidable(BuildContext context) {
    final slidable = Slidable.of(context);
    final isClosed = slidable.renderingMode == SlidableRenderingMode.none;
    if (isClosed) {
      Future.delayed(Duration.zero, () {
        if (slidable.mounted) {
                    slidable.open(actionType: SlideActionType.secondary);

        }
      });
    }
  }

这将自动打开您的滑动件（如果它已关闭）。 Slidable 的 Child 应该包含在 Builder 中才能工作。

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