After skimming through the code and knowing that it was a job that took only four hours, it's very likely that this is just objective-c code written in swift(as

After skimming through the code and knowing that it was a job that took only four hours, it's very likely that this is just objective-c code written in swift(as the saying goes, you can write java in any language). It will take a bit more time to learn the idiomatic swift style and implementation.