iOS Developer: how to be prepared for an interview

Sometimes my company needs to hire new iOS Developer and, in the last year, I was responsible for the interviews. I've found a lot of articles regarding how to do the perfect interview and (increase possibilities to) be hired, but no one on how the interviewer should prepare himself.
What do you need to survive?


Brace yourself: Swift is coming

Swift was introduced at Apple's Worldwide Developer Conference (WWDC) 2014 as a replacement for Objective-C. It is the future and every Apple developer is waiting the right moment to start to use it: is this the right moment?