How to build BEAM libraries

Before building the BEAM libraries you should build boost and openssl libraries

Boost

download https://github.com/faithfracture/Apple-Boost-BuildScript
change boost.sh: add arm64e architecture to IOS_ARCHS=("armv7 arm64")
build

OpenSSL

download https://github.com/levigroker/GRKOpenSSLFramework
change build.sh: add build "arm64e" "${IPHONEOS_SDK}" "ios" below build "arm64" "${IPHONEOS_SDK}" "ios"
build

After building boost and openssl

Download mainnet, masternet, testnet sources of BEAM
Copy build_ios.sh, cmake_install.cmake from iOS project to beam sources project
Change export properties in build_ios.sh. Paste your paths for boost and openssl libraries
Open terminal and run build_ios.sh

How to build iOS project

Install cocoa pods
Add a boost library to the project
Add a latest BEAM libraries: mainnet, masternet, testnet
Change the header search paths, depending on where your libraries are