我正在尝试安装flutter,并在visual studio代码上运行基本的flutter示例。我在命令行中使用了flutter doctor,并安装了所有缺少的要求,现在我尝试在flutter中运行一个基本程序,但在visual studio代码输出中,我得到以下错误
[Running] dart "c:\fluttercode\mobile_test1\lib\main.dart"
'dart' is not recognized as an internal or external command,
operable program or batch f
我是新来的。当我运行我的代码时,我得到了错误
E/flutter (16181): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: Unhandled error type '() => Future<List<Food>>' is not a subtype of type 'List<Food>' occurred in Instance of 'MenuBloc'.
E/flutter (16181): #0
Windows 10与代码1.56.2
I'm using flutter 1.22.
I'm trying to upgrade flutter 2.2.0
[√] Flutter (Channel dev, 2.3.0-12.1.pre, on Microsoft Windows [Version 10.0.19042.985], locale ru-RU)
• Flutter version 2.3.0-12.1.pre at D:\flutter
• Upstream repository https://github.com/f
不过,在我将MacOS更新到10.15.7版本之前,我不能保证这是真正的问题所在。
同样的代码在安卓上运行得很好,但当我在iPhone上运行它时,我得到了以下错误:
[ +2 ms] Unable to install /Users/***/project_dir/build/ios/iphonesimulator/Runner.app on 4E3679AE-08E6-4DBE-A940-20E4D34F2122. This is
sometimes caused
by a malformed plist file:
ProcessExcept
对不起,事先我还不太熟悉,我的解释也不太简洁。
我有一个问题,损坏颤振文件。我的项目很好,直到不久前,当一些文件损坏,我想。我认为这可能与我更改项目文件名以生成不同版本有关,但正因为如此,有些文件已经变成了某种奇怪的格式。
任何帮助将不胜感激,要么修复或防止它在未来!
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel master, v1.10.3-pre.66, on Microsoft Windows
[Version 10.0.18362.356], locale en-ZA
奇怪的行为
颤振医生首先打印两行如下:
The system cannot find the specified path
The system cannot find the specified path
但仍在继续这项工作:
[√] Flutter (Channel master, v1.12.16-pre.35, on Microsoft Windows [Version 10.0.14393], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[
我一直在尝试在我的笔记本电脑上设置Flutter,但没有成功。问题最有可能出现在VS Code中的扩展或其他方面。我可以从Powershell运行颤动命令,没有问题。但是从VS Code命令面板执行的命令报告如下: [flutter] flutter doctor -v
'where' is not recognized as an internal or external command,
operable program or batch file.
Error: Unable to find git in your PATH.
exit code 1 奇怪的是,我的电
我意识到这是的翻版,但是这个问题似乎没有任何活动,所以我试图让更多的人关注这个问题。
我正在尝试使用percent图标,尽管在fonts.google.com站点中,它显示了颤振实现(下面的屏幕快照),当我试图从颤振代码调用它时,我会得到错误The getter 'percent' isn't defined for the type 'Icons'. (下面的屏幕快照)。
这是什么原因,为什么谷歌试图显示某些图标是支持颤振的,而它显然不是?
下面是我的flutter doctor -v输出:
[√] Flutter (Channel
我创建了一个flutter项目,并运行flutter packeages get,输出如下: second flutter packages get等待另一个flutter命令释放启动锁定……在秒内运行"flutter packages get“...当前的Dart SDK版本是2.0.0-dev.63.0.flutter-4c9689c1d2。
Because second depends on flutter_test any from sdk which requires SDK version <2.0.0, version solving failed.
pub get
代码:无法在web中创建数据库 var dbPath = p.current;
var dir = await Directory(dbPath).create(recursive: true);
var pa = p.join(dir.path, 'my_database.db');
DatabaseFactory dbFactory = databaseFactoryIo;
Database db = await dbFactory.openDatabase(pa);
var store = StoreRef.main();
await sto
当我在vs代码上运行我的flutter应用程序时,我得到这个错误: lib/ui/pages/home_pages/ads_view.dart:65:39: Error: No name 'List‘。 ^^^^
../../../Desktop/flutter/packages/flutter/lib/src/painting/gradient.dart:366:9: Context: Found this candidate, but the arguments don't match.
co