Encryption not working in iOS React Native

I'm trying to encrypt decrypt data in React Native. It works fine on Android but not on iOS. I've done import AesCrypto from 'react-native-aes-kit'. I've also tried to import {NativeModules} from 'react-native'const {AesCrypto}=NativeModules.

But nothing seems to be working on iOS.Done with pods installation and podspec files also saved under react-native-aes-kit. Thanks in advance.