I need help to build ionic with iOS i have this problem :-CodePudding

ionic cordova build ios

ng run app:ionic-cordova-build --platform=ios Error: Unknown argument: platform [ERROR] An error occurred while running subprocess ng.

    ng run app:ionic-cordova-build --platform=ios exited with exit code 1.
    
    Re-running this command with the --verbose flag may provide more
    information.

CodePudding user response：

It looks like you're running into permission issues. If you are installing npm-packages then it might possible that you are getting an EACCES error when trying to install a package globally. This means you do not have permission to write to the directories npm uses to store global packages and commands.

Try running commands:

sudo chmod u x -R 775 ~/.npm
sudo chown $USER -R ~/.npm

or you can just run any npm command with sudo, that should get resolve your issue.

sudo ionic cordova build ios

I'd recommend you to take a look at https://docs.npmjs.com/getting-started/fixing-npm-permissions

CodePudding user response：

try build ios with this command :

ionic cordova build ios -- --buildFlag="-UseModernBuildSystem=0"