无法顺利运行项目

Question

我正在尝试构建一个flutter项目，根据下面的错误日志，我反复遇到此错误。

我应该如何解决？

> Compiler message:
> ../../../Documents/flutter/packages/flutter/lib/src/cupertino/page_scaffold.dart:116:31:
> Error: The getter 'navigationBar' isn't defined for the class
> '_CupertinoPageScaffoldState'.
>  - '_CupertinoPageScaffoldState' is from 'package:flutter/src/cupertino/page_scaffold.dart'
> ('../../../Documents/flutter/packages/flutter/lib/src/cupertino/page_scaffold.dart').
> Try correcting the name to the name of an existing getter, or defining
> a getter or field named 'navigationBar'.
>       final fullObstruction = navigationBar.shouldFullyObstruct(context) == null ||
> navigationBar.shouldFullyObstruct(context);
>                               ^^^^^^^^^^^^^

Answer 1

在您的路线中导入以下库。

import 'package:flutter/cupertino.dart';