颤振：致命错误：找不到'Flutter/Flutter.h'文件

Question

Xcode的输出：↳在/Users/dani/development/flutter/.pub cache/hosts/pub.dartlang.org/url_launcher-6.0.3/ios/Classes/FLTURLLauncherPlugin.m:/Users/dani/development/flutter/.pub cache/hosts/pub.dartlang.org/url_launcher-6.0.3/ios/Classes/FLTURLLauncherPlugin.h:5:9:致命错误：找不到"Flutter/Flutter.h"文件#导入<Flutter/Flutter.h>^~~~~~~~~~~~~~~~~~~生成1个错误。在/Users/dani/development/flutter/.pub cache/hosts/pub.dartlang.org/shared_preferences-2.0.5/ios/Classes/FLTSharedPreferencesPlugin.m:5:/Users/dani/development/flutter/.pub cache/hosts/pub.dartlang.org/shared_preferences-2.0.5/ios/Classes/FLTSharedPreferencesPlugin.h:5:9:致命错误：找不到"Flutter/Flutter.h"文件#导入<Flutter/Flutter.h>^~~~~~~~~~~~~~~~~~~生成1个错误。命令CompileSwift失败，退出代码为非零命令CompileSwift失败，退出代码为非零注意：使用新的构建系统注：并行构建目标注：规划构建注意：构建构建描述

扑动医生：

[✓] Flutter (Channel stable, 2.0.5, on macOS 11.2.3 20D91
darwin-x64, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android
SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] Connected device (3 available)
• No issues found!

我尝试了这里提出的所有解决方案，但没有成功：https://github.com/flutter/flutter/issues/16036

所有依赖项更新

Answer 1

这是在我们的应用程序上找到一个不支持空安全的库的问题。识别后我们可以做几件事：

• 询问其回购以获得零安全支持
• 使用支持此功能的其他库
• 试着自己解决

stackoverflow.com/a/3509278/4858133

Answer 2

我认为您应该同时尝试这两个步骤：

1-尝试删除pod文件并通过执行重新安装它们

$ cd ios/
$ pod deintegrate 
$ pod install

2-通过在项目根上执行命令来清洁工作场所：

$ flutter clean

然后尝试再次运行该应用程序。