Fatal error: 'Flutter/Flutter.h' file not found #import <Flutter/Flutter.h> - iOS

Question

My app was working well until I came across the following issue: "Fatal error: 'Flutter/Flutter.h' file not found #import <Flutter/Flutter.h>" :

Launching lib/main.dart on iPhone 12 Pro Max in debug mode...
lib/main.dart:1
Xcode build done.                                            8.1s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **
Xcode's output:
↳
    In file included from /Users/XnameX/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-2.0.2/ios/Classes/FLTPathProviderPlugin.m:5:
    /Users/XnameX/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-2.0.2/ios/Classes/FLTPathProviderPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
    #import <Flutter/Flutter.h>
            ^~~~~~~~~~~~~~~~~~~
    1 error generated.
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Analyzing workspace
    note: Constructing build description
    note: Build preparation complete
    note: Removed stale file '/Users/XnameX/Library/Developer/Xcode/DerivedData/Runner-cfjslqyzzdpnoyeoygvffcmbgtpq/Build/Products/Debug-iphonesimulator/sqflite/sqflite.framework'
Could not build the application for the simulator.
Error launching application on iPhone 12 Pro Max.
Exited (sigterm)

What can I do to resolve this? Thanks a lot in advance!

Solution

This is what worked for me.

1. Delete your .pubcache folder, you can find it where you installed flutter to (you can run "which flutter" if you are not sure where) it is usually a hidden file so you would have to enable your settings to show hidden files (shift + Command + full stop to show hidden files on Mac).
2. Run "flutter clean" in your terminal (ensure build folder is removed)
3. Delete symlinks, pods and podfile.lock from the ios folder
4. Delete your pubspec.lock file
5. Build again

If you are still having issues you can go further 1)Downgrade Flutter with "flutter downgrade" 2) flutter pub cache repair 3) delete Generated.xcconfig from ios/Flutter directory 4) pod install (from the ios directory) 5) build again

Comments

[Alvaro-99]

Hello! I tried this link (kindacode.com/article/…) and followed step-by-step the instructions in this link, but I still get the same error. What should I do?

[Luke Irvin]

Hello. Did you find a way to resolve this?