Jesse Squires has come up with a great way to reduce the bloat of your viewDidLoad methods and increase the readability of your code. He suggests using the didSet method of IBOutlets to do any initialisation needed for just that control. Great idea.
With much better support for external keyboards in iOS 9, UIKeyCommand is going to be something we need to get more familiar with. Nate Cook goes through the basics and covers what's new with these APIs in iOS 9.
Now that we've had a couple of months with Swift 2 and the new features, we're moving away from "Look, new stuff!" and into how to actually use these things for real. In this article, Benjamin Encz takes a deeper look at Swift’s new error handling and how to mix it with Objective-C code.
There are a lot of image downloading and caching libraries out there but this new one from Pinterest is worth a look. The focus is on getting images displayed to the user as quickly as possible, including setting priorities for images, progressive JPEG downloading and support for WebP images and animated GIFs (through FLAnimatedImage).