Encountered error while building for device - flutter

Jimmy Anderson after running flutter upgrade, with the existing project you need to check the dependencies used if they are up to date too.

I had the same error with version 1.20.1 and the solution was to delete the Pods folder, the pubspec.lock file:

): Clean completely all points to links:

flutter cleanrm -Rf ios/Podsrm -Rf ios/.symlinksrm -Rf ios/Flutter/Flutter.frameworkrm -Rf ios/Flutter/Flutter.podspec

): Finally run these:

rm ios/Podfilerm pubspec.lockflutter run

If anyone has an up-to-date answer can complete this temporary solution.

Those steps worked for me:

1. Run flutter build
2. Open Xcode (Runner.xcworkspace)
3. Go to Product -> Clean Build Folder
4. Run on a real Device
5. Then try again - flutter build ios

These steps helped me to resolve a similar issue

1. At first try to take an Android build by following these steps

• Delete pubspec.lock file
• flutter clean ( inside ur project directory )
• flutter pub get
• flutter build apk --release

I then saw my Android build fail, it was some dependency related issues and I fixed those. Then repeated the above step 1. After that my Android build was successful.

2. Then try to take the iOS build by following these steps

• Deleted Pods folder inside the ios directory
• Deleted the Podfile.lock file inside the ios directory
• cd ios
• pod install
• pod update
• cd ..
• flutter clean
• flutter pub get
• flutter build ios --release

And then my iOS build was successfull