Sliders as Knobs

You've seen other apps rotate views, but you may have no idea how to do it yourself. Let me show you one way to rotate views. We'll make a simple knob control you might be able to use in your apps. Download the example file. On the storyboard, I added an UIImageView of a knob …

CALayer Masks

UI doesn't have to look like a rectangle. You might want a different shape for your icon. You can do that with layer masks. Let's learn how to set them up. Download the example files. You'll find an app with two square buttons. If you head over to the assets, you see I have a …

From Apple to Raspberry Pi: Living without Storyboards and Interface Builder

In iOS, avoiding Interface Builder is nearly impossible. IB is old - as old as the Xcode SDK itself. Interface builder was one of the components of NextStep, and thus one of the reasons Steve Jobs got his old job back, who then developed NextStep into the platform for all Apple products. In more recent …