flutter - 如何在用 singlechildscrollview 包裹的列内使用间隔器？

Question

我试图在用 singlechildscrollview 包裹的列中使用间隔器，它给了我一个错误。

RenderFlex children have non-zero flex but incoming height constraints are unbounded.

这是我的小部件

class Test extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Form(
        child: SingleChildScrollView(
      child: Column(
        children: <Widget>[
          TextFormField(),
          TextFormField(),
          //Spacer()
          Divider(),
          Icon(Icons.block)
        ],
      ),
    ));
  }
}

我应该用什么？感谢您的帮助

Answer 1

你可以试试这个，我用你的代码添加了一个例子，它有效:

class Test extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(body: LayoutBuilder(
      builder: (context, constraint) {
        return Form(
          child: SingleChildScrollView(
            child: ConstrainedBox(
              constraints: BoxConstraints(minHeight: constraint.maxHeight),
              child: IntrinsicHeight(
                child: Column(
                  children: <Widget>[
                    TextFormField(),
                    TextFormField(),
                    Spacer(),
                    Divider(),
                    Icon(Icons.block)
                  ],
                ),
              ),
            ),
          ),
        );
      },
    ));
  }
}

有关上述解决方案的更多详细信息，请查看此 Github 问题: Wrapping a Column with an expanded in a SingleChildScrollView throws an exception