Unrecognized method. (irritants: setBigDefaultText)

App runs in Android, but with iOS: I get
error: unrecognized method. (irritants: setBigDefaultText)
Any ideas?

None, you do not show where the error is coming from....

Welcome Andreas.

It appears setting

** on the Screen Designer Properties does not work with ios Projects** Andreas. It appears you discovered a bug.

Try using the setting on an Android device or the emulator. The error will probably disappear.

Thank you for reporting this.

The same happens with HighContrast. (It works after deselection.)

I wouldn't say it's a bug, rather it's just not implemented yet per doesappinventorrunonios.com. The feature in question was added after the iOS companion was accepted to the App Store and will be implemented in a future release.