相关疑难解决方法(0)

我正在我的 flutter 应用程序中实现 DraggableScrollableSheet，并希望有一个粘性标题，即只有列表视图滚动，并且工作表的顶部始终保持在原位。我的小部件看起来像这样：

SizedBox.expand(
    child: DraggableScrollableSheet(
      maxChildSize: 0.9,
      minChildSize: 0.2,
      initialChildSize: 0.3,
      expand: false,
      builder:
          (BuildContext context, ScrollController scrollController) {
        return Container(
          decoration: BoxDecoration(
              color: Colors.white,
              borderRadius: BorderRadius.only(
                topLeft: Radius.circular(20),
                topRight: Radius.circular(20),
              )),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Align(
                alignment: Alignment.topCenter,
                child: Container(
                  margin: EdgeInsets.symmetric(vertical: 8),
                  height: 8.0,
                  width: 70.0,
                  decoration: BoxDecoration(
                      color: Colors.grey[400],
                      borderRadius: BorderRadius.circular(10.0)),
                ),
              ),
              SizedBox(height: 16),
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 24),
                child: Text(
                  'Neuigkeiten',
                  style: TextStyle(
                      fontSize: 20, fontWeight: FontWeight.bold),
                ),
              ),
              Padding(
                padding: …