iOS Question Using custom B4A libraries in B4i

1. You can use the same source code. You cannot use the compiled libraries.

2. iOS works with static libraries or frameworks. B4i libraries can reference both types of libraries.

Thank you, but there are still some questions remain

1) Yes, I have a source code in Java for my *.JAR library used in B4A. Where I can read how to compile a library for B4i from that?
2) I have a "Calc.so" shared library file but could find in B4i documentation how to refer its function from B4i Basic code. Could you provide a link to code example, please?

Sorry, I thought that the calc library was written in B4A. You cannot use Java libraries in iOS.

An .so library will not help. You need to have the source code and create a static iOS library.

I have a similar problem - source code in C that want to reuse in B4i.
I can compile that with GNU C compiler into *.a library but when I try to convert *.h files by your Jar tool into *.xml, got a void file with "not-a-library error".
Any idea about using 3rd party C code in B4i?

You will need to wrap it with an Objective C class.