xcode showing warnings as errors

I turned on the setting "Treat Warnings as Errors" used it for a while and then turned it off however warnings still build as errors. I have restarted xcode and my pc. enter image description here

How do I fix Xcode warnings?

However, if you trust Xcode enough, you can simply follow this shortcut to to automatically fix fixable warnings. control + option + command + F or Control ⌃ + Option ⌥ + Command ⌘ + F . This will fix all the fixable errors in current scope.

How do I ignore a warning in Swift?

If you want to disable all warnings, you can pass the -suppress-warnings flag (or turn on "Suppress Warnings" under "Swift Compiler - Warning Policies" in Xcode build settings).

Try to override this setting on the Target level, rather than Project's.