Sixteen years ago, in the early days of the App Store, we built an app called The Red Carpet. It let you follow the Oscar nominees, wrapped around an audacious hook: guess every winner correctly and win a million dollars. The contest was real. We’d secured a $1M policy from Lloyd’s of London, gotten bonded […]

Last year I sold almost all of an Apple position I’d spent fifteen years building. The decision had nothing to do with the stock price. I assumed it would keep climbing for a while, the way Intel kept climbing long after it stopped being the company that defined its industry. Great companies run on a […]

In iOS development, there’s always been a fight over Controllers. The path of least resistance, when you have a piece of new logic to add, is to just throw it in the Controller. Every Apple WWDC for years would pretend this is how you add this new API. Drop in three lines, ship it. The […]

We all love to have animation in our app’s interface. But sometimes writing even the simplest animation can be rather elusive. Rotation is a case in point. As you probably know, the way to rotate a view (or a layer) is to change its transform, applying a rotation transform to it. But certain rotations are […]

Test automation is probably the single most important factor within an agile software project. Providing a customer with small, working increments of a product, delivered frequently, requires the pipeline from feature design to product delivery to operate very fast. The biggest hurdle in delivering a small change quickly is regression testing. The trouble stems from […]

Here’s a little Swift language trick I sometimes use — more often than you might suppose, actually. As I’m sure you know, Swift is very strict about the types of its objects. You have to declare clearly what type a reference is, and from then on, you have to stick to that. That’s one of […]

What’s the business model for an iOS app? If you aren’t just distributing an app as a freebie out of the goodness of your heart (several of my apps do work that way), and if you aren’t being paid directly by a client to create or maintain the app in the first place, and if […]

A developer’s typical working procedure is: Create a feature branch off of master. Implement the feature, which will destabilize the code… Then, spend time getting everything back into a working state. It’s as if you needed to replace a part in your car that is buried deep inside of it — so first, you have […]