Andrea Mazzini with a look at the new changes in iOS 9 for UIDynamics while building a simple basketball game. It's been a while since I've looked at dynamics myself but from the look of this app, it no longer fights with Auto Layout which is great news! Not sure if that's an iOS 9 thing or whether this was previously fixed in iOS 8.
I found that the best way to think about Dixie was to see it as like a mocking framework that you enable globally inside your app rather than only in your test target. This allows various parts of your app to be replaced for integration tests, amongst other things. Just remember to #ifdef it out of your distribution builds 😎.
Michał Kałużny looks at building a complication in watchOS 2. It's a relatively straightforward API but there are still a few gotchas to watch out for. The example in the article is creating a complication to show the time for the next bus in a transit app. It goes through the basics, and then moves into dealing with time travel 😁.
Want to replicate the look of the Apple Watch/Activity app rings? This library from Petr Korolev should sort you out. It doesn't do the fancy overlapping rings (as far as I can tell) but it's an easy way to get that same kind of look and feel. Great support for IBInspectable & IBDesignable as well.