Question

对于第一个flutter sdk可用的flutter项目，MaterialApp flutter小部件给出错误“期望1个必需参数，但找到0个”。我在VScode上运行它。这是代码。预先感谢。

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(   // This line is giving Error at'('
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

Answer 1

我使用VSCode遇到了完全相同的问题，发现此问题可以解决此问题：

在Flutter安装目录中运行以下命令：

git clean -xfd
git stash save --keep-index
git藏匿点
git pull
颤抖的医生

https://github.com/flutter/flutter/wiki/Workarounds-for-common-issues#flutter-installation-corrupted

为什么Flutter MaterialApp Widget会显示错误“所需参数不足”

1 个答案: