我无法解决这个问题我在导航栏中创建导航栏和创建帐户设计但我只能看到空白页

Question

RenderBox 没有布局：

_RenderListTile#934f1 relayoutBoundary=up11 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE 'package:flutter/src/rendering/box.dart': 断言失败：第 2001 行 pos 12: 'hasSize' 我遇到了这个问题!!

import 'package:flutter/material.dart';

class SettingsScreen extends StatelessWidget {
  const SettingsScreen({Key? key}) : super(key: key);


  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Padding(
        padding: EdgeInsets.only(
          top: 50,
          right: 20,
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              'Settings',
              style: TextStyle(
                fontSize: 30,
                fontWeight: FontWeight.w500,
              ),
            ),
            Row(
              children: [
                ListTile(
                  onTap: (){},
                  leading: CircleAvatar(
                    radius: 30,
                    backgroundImage: AssetImage('assetimage/doctor1.jpg'),
                  ),
                  title: Text(
                    'Dr Doctor Name',
                    style: TextStyle(
                      fontWeight: FontWeight.w500,
                      fontSize: 25,
                    ),
                  ),
                  subtitle: Text(
                    'Profile',
                  ),
                ),
              ],
            ),
            Divider(
              height: 50,
            ),
            ListTile(
              onTap: () {},

              leading: Container(
                padding: EdgeInsets.all(8.0),
                decoration: BoxDecoration(
                  color: Colors.blue.shade100,
                  shape: BoxShape.circle,

                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

写，看空白页