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

Question

Hello i am having this error when I run my app.
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **
Xcode's output:
↳
In file included from /Users/daegilpyo/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-5.7.10/ios/Classes/FLTURLLauncherPlugin.m:7:
/Users/daegilpyo/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-5.7.10/ios/Classes/FLTURLLauncherPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
^~~~~~~~~~~~~~~~~~~
1 error generated.
5
Command CompileSwift failed with a nonzero exit code
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
Could not build the precompiled application for the device.
Error launching application on DAEGIL의 iPhone.
Exited (sigterm)
This is happening after I change the channel from stable to master..
I don`t know why I am having this error.
Plz let me know, I am waiting for you help..
this is flutter doctor - v
[✓] Flutter (Channel stable, 1.22.5, on macOS 11.0.1 20B50 darwin-x64, locale en-CA)
• Flutter version 1.22.5 at /Users/daegilpyo/Developer/flutter
• Framework revision 7891006299 (5 days ago), 2020-12-10 11:54:40 -0800
• Engine revision ae90085a84
• Dart version 2.10.4
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
• Android SDK at /Users/daegilpyo/Library/Android/sdk
• Platform android-29, build-tools 29.0.3
• Java binary at: /Applications/12.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 12.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.2, Build version 12B45b
• CocoaPods version 1.10.0
[✓] Android Studio (version 3.6)
• Android Studio at /Applications/12.app/Contents
• Flutter plugin version 47.1.1
• Dart plugin version 192.8052
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
[✓] Connected device (1 available)
• DAEGIL의 iPhone (mobile) • 00008020-0011243A2279002E • ios • iOS 14.2
• No issues found!

Answer 1

I had this problem a week ago, I removed the ios/Flutter folder from my directory and ran these commands and changed by deployment target to 11.0
-> flutter create
-> flutter pub cache repair
-> cd ios
-> pod init
-> pod install
After following these commands, I could build the iOS on the simulator and also create the archive.

Answer 2

The project absolute path don't have Space ' '.
My project path is '/Volumes/Macintosh Data/work/test/ios' then error, move to '/Users/macbook/Documents/workspace/test/ios' is OK.
if modify pubspec.yaml file dependencies, then redo:
rm -rf ./ios
flutter create -i swift .