IOS build issue

My android app builds working fine, but IOS build not working .IOS app not heating web services .Please give me any suggestion.I am working on ionic 3.

Can you please tell, what error are you getting?

Actually, android build works fine , but IOS Error is 'Plugin_not_Installed ’ and Unable to execute sql:(“code”:“5”,“message”:“no such table”:usernamelist)

please provide more information like where you are getting that errors.(particular scenario)
And It is best if you will provide the screenshots of errors.

Please use your database connection from one global place( from service public variable ).

Currently, your call is initializing new DB connection and that is not getting Table. So, create the table from same connection and fire the SQLite query from same connection

Thanks,
Parshav