Custom Plugin for Native IOS SDK

#1

HI ,
I am trying create custom cordova plugin for IOS Sdk “https://developer.vantiv.com/docs/DOC-1915”.
before that i hava tried to call existing hellow world plugin using ionic 4 app,but it throw me an error like


my project is here “https://github.com/Saravanan109587/TriPosConsumer
i have searched a lot but i could not able to find proper way to call custom plugin in Ionic 4 app.
can anyone help me??