grid - 如何在 Flutter 中居中列和行项目？

Question

我有一个小货币表。我没有使用网格。我使用了列和行。问题是行中的项目没有显示在中心，如下面的 Excel 示例所示。
我必须使用什么小部件才能使项目居中？



示例代码:

return new Center(
  child: new Column(
    crossAxisAlignment: CrossAxisAlignment.center,
    children: <Widget>[
      new Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          new Padding(
            padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
            child: new Icon(
              Icons.crop_rotate,
              color: Colors.white,
            ),
          ),
          new Padding(
            padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
            child: new Text("STG", style: mainHeadTextStyle),
          ),
          new Padding(
            padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
            child: new Text("EUR", style: mainHeadTextStyle),
          ),
          new Padding(
            padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
            child: new Text("USD", style: mainHeadTextStyle),
          ),
        ],
      ),
      new Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
....
....
....

Answer 1

如果您希望整个表为 Centered ，使用 mainAxisAlignment 的属性(property)Column .

栏目

mainAxisAlignment: MainAxisAlignment.center //Center Column contents vertically,
crossAxisAlignment: CrossAxisAlignment.center //Center Column contents horizontally,

行

mainAxisAlignment: MainAxisAlignment.center //Center Row contents horizontally,
crossAxisAlignment: CrossAxisAlignment.center //Center Row contents vertically,