两者之间的空间不起作用，我做错了什么？

Question

用于迁移图像https://lh3.googleusercontent.com/sTFx8QfUzgnrT69cK54V9igmCd04GLIlTmrwAC01GISRDsbGNL9KZeXNnKeILHdNUQ=w1853-h942的应用

我在做什么

class ScheduleListItem extends StatelessWidget {
  ScheduleListItem({Key key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Container(
      height: 300,
      decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.circular(10),
          boxShadow: [
            BoxShadow(
                color: Colors.black26, offset: Offset(0, 5), blurRadius: 5)
          ]),
      margin: EdgeInsets.all(7),
      child: Row(
        mainAxisSize: MainAxisSize.max,
        children: <Widget>[
          Container(
            width: 15,
            decoration: BoxDecoration(
                color: Colors.red,
                borderRadius:
                    BorderRadius.horizontal(left: Radius.circular(10))),
          ),
          Column(

            children: <Widget>[
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween ,
                children: <Widget>[Text("Data"), Text("Data")],
              ),
              Row(
                children: <Widget>[Text("Data"), Text("Data")],
              ),
              Row(
                children: <Widget>[Text("Data"), Text("Data")],
              )
            ],
          )
        ],
      ),
    );
  }
}

Answer 1

你需要将你的Column包裹在Expanded然后你可以使用Spacer属性，它占用了剩余的空间。

Expanded(
  child: Column(
    children: <Widget>[
      Row(children: <Widget>[Text("Data"), Spacer(), Text("Data")]),
      Row(children: <Widget>[Text("Data"), Spacer(), Text("Data")]),
      Row(children: <Widget>[Text("Data"), Spacer(), Text("Data")])
    ],
  ),
)

如果你在flex有一个以上的Spacer，你也可以在Spacer中使用Row/Column告诉你如何划分剩余区域的占用率

Answer 2

我假设您想将两个Text小部件分开放置一行。如果是这样，您的列不会占据整个水平空间。你可以简单地将它包装成一个Expanded小部件，如下所示：

Expanded(
  child: Column(
    children: <Widget>[
      Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[Text("Data"), Text("Data")],
      ),
      Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[Text("Data"), Text("Data")],
      ),
      Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[Text("Data"), Text("Data")],
      )
    ],
  ),
)

这将产生此输出：