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 …

Tip: Image Literals

iOS Development tips weekly is a series you can find at the Lynda.com and LinkedIn Learning libraries. The first week of a week's tip will be available for free. After that, you will need a subscription to get access to it. Click the image at left  to view.  You'll find an amended transcript below. You’ve …

Swift Swift: Using The Navigation Bar Title and Back button.

[Updated for Xcode 7.2/Swift 2.1 2/5/16] Note: Click here for the  Swift 3.0/Xcode 8 version of this tutorial  In writing the Swift Swift View Controllers book, it came to my attention many people don't understand the functionality of the navigation toolbar's title and Back button. In an early part of writing, I planned to skip …