There are some excellent examples on the code repository that show the starting developer how to read and write data using the IVEF Library.
The 0.1 version of the SDK supports examples (ilisten, ivef2kml) that demonstrate reading IVEF data from a streaming socket or file.
The 0.2 and 1.0 versions of the SDK contain one example (ilisten)
The SDK supports one example (isim) that demonstrates reading IVEF data from a file (which can be created with ilisten) and replay the information, streaming over a (server) socket.
There are no publicly available examples of the usage of IVEF SDK demonstrating the Objective-C language.