The iOS Deployment Target 'Iphoneos_Deployment_Target' Is Set to 8.0, in Flutter How to Change the Minimum iOS Deploying Target

The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, in Flutter How can I change the minimum IOS Deploying Target

I solve it with this code, thanks!
At the end of the PodFile

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
    end
  end
end

IPHONEOS_DEPLOYMENT_TARGET is set to 8.0 Xcode 12 (Flutter)

In addition to what Akif said, here's a running list of reasons why this error could be showing up for you:

1. Set the MinimumOSversion to 9.0 in ios/Flutter/AppFrameworkInfo.plist
2. In Xcode, ensure that the iOS deployment target at Runner -> Project -> Runner is set to 9.0
3. In Xcode, ensure that the Deployment Info in Runner -> Targets -> Runner is set to iOS 9.0
4. Double check that your GoogleService-Info.plist is there and was added via Xcode (not copy/pasted into the directory via Finder for example)
5. Uncomment the #platform :iOS, '9.0' line in your ios/Podfile

Then, run the following in your terminal to build with a fresh state:

flutter clean \
        && rm ios/Podfile.lock pubspec.lock \
        && rm -rf ios/Pods ios/Runner.xcworkspace \
        && flutter build ios

Flutter - The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0 && Build input file cannot be found GoogleService-Info.plist

To get rid of this warning:

    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'AppAuth' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'GTMAppAuth' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'gRPC-Core' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'BoringSSL-GRPC' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 5.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'leveldb-library' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'gRPC-C++-gRPCCertificates-Cpp' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 4.3, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'nanopb' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'GTMSessionFetcher' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'gRPC-C++' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 7.0, but the range of supported deployment target versions is 8.0 to 13.4.99. (in target 'abseil' from project 'Pods')

Make sure your Podfile contains this line

config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'

post_install do |installer|
  installer.pods_project.targets.each do |target|
  flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'
    end
  end
end

To make the app build successfully and get rid of:

error: Build input file cannot be found: '/Users/User/Downloads/GoogleService-Info.plist' (in target 'Runner' from project 'Runner')

remove and add again through Xcode, the GoogleService-Info.plist file.

Flutter cannot build application

I figured out the issue. Xcode failed to build the application because the iOS wasn't compatible with my version of flutter. I fixed this issue by changing my channel to master

flutter channel master
flutter upgrade

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