flutter - fatal error : 'Flutter/Flutter.h' file not found

Question

当我在 mac book pro 中编译我的项目时，显示此错误:

Xcode's output:
↳
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/JavaScriptChannelHandler.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/JavaScriptChannelHandler.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/shared_preferences-0.5.12+4/ios/Classes/FLTSharedPreferencesPlugin.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/shared_preferences-0.5.12+4/ios/Classes/FLTSharedPreferencesPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FlutterWebView.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FlutterWebView.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTWebViewFlutterPlugin.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTWebViewFlutterPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTWKNavigationDelegate.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTWKNavigationDelegate.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTCookieManager.m:5:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/webview_flutter-0.3.24/ios/Classes/FLTCookieManager.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
In file included from /Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/wakelock-0.1.4+2/ios/Classes/WakelockPlugin.m:1:
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/wakelock-0.1.4+2/ios/Classes/WakelockPlugin.h:1:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
        ^~~~~~~~~~~~~~~~~~~
1 error generated.
/Users/dolphin/.pub-cache/hosted/pub.flutter-io.cn/video_player-0.10.12+5/ios/Classes/messages.m:4:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>

我尝试通过这种方式修复它:

~/apps/flutter/bin/flutter clean

没有用，然后我尝试了这种方式:

$ pod install
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/universal-darwin19/rbconfig.rb:229: warning: Insecure world writable dir /Users/dolphin in PATH, mode 040777
Analyzing dependencies
Downloading dependencies
Generating Pods project
Integrating client project
Pod installation complete! There are 15 dependencies from the Podfile and 18 total pods installed.

[!] A license was specified in podspec `sentry_flutter` but the file does not exist - /Users/dolphin/Documents/GitHub/cruise-open/ios/.symlinks/plugins/LICENSE

[!] Unable to read the license file `../../LICENSE` for the spec `sentry_flutter (0.0.1)`

[!] Unable to read the license file `../../LICENSE` for the spec `sentry_flutter (0.0.1)`

[!] CocoaPods did not set the base configuration of your project because your project already has a custom config set. In order for CocoaPods integration to work at all, please either set the base configurations of the target `Runner` to `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` or include the `Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig` in your build configuration (`Flutter/Release.xcconfig`).
(base)

仍然不起作用，为什么会发生这种情况，我该怎么办？这是我的 channel :

$ ~/apps/flutter/bin/flutter doctor -v
[✓] Flutter (Channel stable, 1.20.4, on Mac OS X 10.15.7 19H114, locale en-CN)
    • Flutter version 1.20.4 at /Users/dolphin/apps/flutter
    • Framework revision fba99f6cf9 (4 months ago), 2020-09-14 15:32:52 -0700
    • Engine revision d1bc06f032
    • Dart version 2.9.2
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /Users/dolphin/Library/Android/sdk
    • Platform android-30, build-tools 30.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.3, Build version 12C33
    • CocoaPods version 1.10.0

[!] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[!] IntelliJ IDEA Community Edition (version 2020.3.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[!] IntelliJ IDEA Ultimate Edition (version 2019.2.2)
    • IntelliJ at /Users/dolphin/Applications/JetBrains Toolbox/IntelliJ IDEA Ultimate.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.52.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.18.1

[✓] Connected device (1 available)
    • iPhone 11 Pro (mobile) • 4FEAF225-103D-4237-96D7-026059D2BDB4 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-7
      (simulator)

! Doctor found issues in 3 categories.
(base)

Answer 1

由于您拥有较旧版本的 flutter(9 月发布)，我建议您将 flutter 升级到最新的稳定版本 1.22.5。只需输入终端

flutter upgrade

如果这没有帮助，请删除 ios 文件夹，然后输入项目的根目录

flutter create .

重新创建 ios 文件夹并再次尝试构建。