title: fatal error: 'Flutter/Flutter.h' file not found
body: <p>when I compile my project in mac book pro, shows this error:</p>
  <pre><code>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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
          ^~~~~~~~~~~~~~~~~~~
  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 &lt;Flutter/Flutter.h&gt;
  </code></pre>
  <p>I am tried this way to fix it:</p>
  <pre><code>~/apps/flutter/bin/flutter clean
  </code></pre>
  <p>did not work, then I tried this way:</p>
  <pre><code>$ 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)
  </code></pre>
  <p>still not work, why did this happen and what should I do fix it? This is my channel:</p>
  <pre><code>$ ~/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)
  </code></pre>