flutter - 得到错误 `Failed assertion: line 1687 pos 12: ' hasSize '` when render ListTile inside ` Row`

Question

我在 flutter 中有以下代码。

Widget build(BuildContext context) {
    return Center(
      child: Card(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            Row(
              children: <Widget>[
                SizedBox(
                    height: 100,
                    child: ListTile(
                      leading: IconButton(
                        iconSize: 30,
                        icon: roundImage(post.userPicture, Icon(Icons.person)),
                        onPressed: () {},
                      ),
                      subtitle: Text(this.post.message),
                    )),
              ],
            ),
          ],
        ),
      ),
    );
  }

但我收到此错误:

════════ Exception caught by rendering library ═════════════════════════════════
RenderBox was not laid out: RenderPhysicalShape#7713c relayoutBoundary=up3
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1687 pos 12: 'hasSize'
The relevant error-causing widget was
    Card 

我已添加 SizedBox在 Row但它仍然提示 hasSize错误。我该如何解决这个问题？

Answer 1

目前尚不清楚您要实现的目标，而是使用 SizedBox你可以试试包裹在里面 Expanded或 Flexible小部件。