flutter - Flutter：滚动堆栈小部件

Question

我在使用 SingleChildScrollView 的堆栈时遇到了一些问题。我想在屏幕上，我的卡片内容覆盖图像。但卡片仍然可以滚动。我怎样才能做到这一点 ？

我已经尝试使用此代码，但我的卡被切断了：

源代码

class NewsScreenDetail extends StatelessWidget {
  static const routeNamed = '/news-screen-detail';
  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: DrysAppBar(
        appBar: AppBar(),
        scaffoldKey: _scaffoldKey,
        titleAppBar: Text('BERITA'),
        showDrawerMenu: false,
      ),
      body: SingleChildScrollView(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            Stack(
              overflow: Overflow.visible,
              children: <Widget>[
                Container(
                  height: sizes.height(context) / 4,
                  decoration: BoxDecoration(
                    color: Colors.red,
                    image: DecorationImage(
                      fit: BoxFit.cover,
                      image: NetworkImage(
                          "https://homepages.cae.wisc.edu/~ece533/images/airplane.png"),
                    ),
                  ),
                ),
                Positioned(
                  left: 0,
                  right: 0,
                  top: sizes.width(context) / 3,
                  child: Card(
                    color: Colors.blue,
                    child: Text(
                      """
                  What is Lorem Ipsum?
                  Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

                  Why do we use it?
                  It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).


                  Where does it come from?
                  Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.

                  The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.
                    """,
                    ),
                  ),
                )
              ],
            ),
          ],
        ),
      ),
    );
  }
}

我正在尝试在 Stack overflow:visible添加属性，但没有任何反应

标签： flutterdart

Answer 1

根据您的问题、示例和评论，我已经修改了您的代码以适合您似乎想要的内容：

class NewsScreenDetail extends StatelessWidget {
  static const routeNamed = '/news-screen-detail';
  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Stack(
        overflow: Overflow.visible,
        children: <Widget>[
          Image.network("https://homepages.cae.wisc.edu/~ece533/images/airplane.png"),
          Container(
            margin: EdgeInsets.only(top: 200),
            child: Card(
              color: Colors.blue,
              child: Padding(
                padding: const EdgeInsets.all(8.0),
                child: Text(
                  """
                  What is Lorem Ipsum?
                  Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

                  Why do we use it?
                  It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).


                  Where does it come from?
                  Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.

                  The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.
                  """,
                  overflow: TextOverflow.visible,
                  softWrap: true,
                ),
              ),
            ),
          )
        ],
      ),
    );
  }
}