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我试图在Flutter中创建一个Fluent应用程序,但每当我运行它时,都会出现一个我不知道如何解决的错误。请帮帮我

fluent-ui dart flutter

Murilo Capita · 技术社区 · 3 年前

错误:

Either pane or content must be provided
'package:fluent_ui/src/controls/navigation/navigation_view/view.dart':
view.dart:1
Failed assertion: line 55 pos 11: '(pane != null && content == null) || (pane == null && content != null)'

代码:

import 'package:fluent_ui/fluent_ui.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const FluentApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return NavigationView(
      appBar: const NavigationAppBar(
        title: Text('Hello World!')
      ),
    );
  }
}

我最近开始研究这个。我该怎么解决这个问题?

0 回复 | 直到 3 年前

-2

Sachin Jadhav 3 年前

您需要导入材料飞镖包,因为它用于材料设计。。总的来说,你可以用脚手架来包装MaterialApp和其他类,因为它为你提供了所有的设计小部件。复制以下代码并运行它。

import 'package:flutter/material.dart';

    void main() {
      runApp(const MyApp());
    }

    class MyApp extends StatelessWidget {
      const MyApp({super.key});

      @override
      Widget build(BuildContext context) {
        return MaterialApp(
          title: 'Flutter Demo',
              home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Hello World!')
      ),
    );
  }
}

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