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STANLEY's questions

Martin Hope
STANLEY
Asked: 2024-10-24 22:46:41 +0000 UTC
  • 6

在此代码中：

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

    @override
    Widget build(BuildContext context) {
        return Container(
            color: Colors.white,
            width: double.infinity,
            child: const Column(children: [
                _MenuWidgetRow(icon: Icons.computer),
                _MenuWidgetRow(icon: Icons.computer),
                _MenuWidgetRow(icon: Icons.computer),
                _MenuWidgetRow(icon: Icons.computer),
            ],)
        );
    }
}

class _MenuWidgetRow extends StatelessWidget {
    final IconData icon;

    const _MenuWidgetRow({super.key, required this.icon});
    
    @override
    Widget build(BuildContext context) {
        return const Padding(
            padding: EdgeInsets.symmetric(horizontal: 16, vertical: 10),
            child: Row(
                children: [
                    Icon(icon), // Ошибка тут
                    SizedBox(width: 15),
                    Expanded(child: Text('test')),
                    Icon(Icons.chevron_right),
                ],
            ),
        );
    }
}

出现错误：

Arguments of a constant creation must be constant expressions.
Try making the argument a valid constant, or use 'new' to call the 
constructor.dartconst_with_non_constant_argument

这和什么有关系呢？将绿色的推向解决方案:)

flutter