Although I treated myself with an AppCode-license the other day, I'm still a daily user of Xcode. And I'm also a subscriber of John Sundell's Swift by Sundell's RSS-feed. A few days ago I noticed that he moved the little tips from Twitter over to his blog.
I really like those little pieces. I can read them within a minute or two and might learn something new. Did you know for example how to gather test coverage in Xcode?