iOS Question using third party sdk in b4i

Hi,

As I read content of thread:
https://www.b4x.com/android/forum/threads/objective-c-writing-libraries-for-b4i.47024/#content

I just want to confirm with the steps about integrate third party sdk in b4i, which is ios library.

such as alipay sdk, I have got libcrypto.a, libssl.a, AlipaySDK.h and APayAuthInfo.h.

a. how to create xml file, in the thread above, seemed it is illustrated b4j;
b. copy xml to additional libraries folder;
c. select the library in library tab;
d. call function, but the function is written in object c, how we can call in visual basic?