The 16th issue of objc.io is out. Appropriately, it's all about Swift:
The purpose of this issue is neither to give an introduction to Swift nor to present best practices when writing Cocoa/CocoaTouch apps with Swift. For the former, there is Apple’s documentation, and many other resources are coming up. Regarding the latter, the language is way too young, and none of us have had enough experience to confidently talk about best practices.
A recommended read, as always.