I recently wrote an article on a simple custom UIView class you can use to tile an image. Unfortunately – this doesn’t help us in a LaunchScreen, where custom classes are not allowed. Fortunately – there’s another way to tile…
Yearly Archives: 2019
Tiled background image in custom UIView class
Sometimes you need a repeated or tiled image in your app, often for a background. Something like these rain-drops for example: Here’s a simple UIView subclass that accepts an image parameter, and renders a repeated tiled image, even in the…
Presentation Style default in iOS 13
This week is International Week of the Deaf, so to thank the community that have been a big part of my app Subtitles Viewer‘s success, Subtitles Viewer PRO is free for the whole week. Coincidentally, and perhaps unfortunately, iOS 13 is…
Property Wrappers and User Defaults
I love magical new features that help us abstract away boiler-plate code and let us focus on the unique features of our apps. Property wrappers is such a feature, and seriously – it just feels like magic! Let’s take a…
SF Symbols in iOS 13
I was playing with the amazing SwiftUI with Apple’s tutorials (stay tuned, I hope to write something on SwiftUI soon) when I noticed something interesting: Where does this “star.fill” come from, I wondered… There’s no “star.fill” in the asset catalog?!…
Swift 5 – it’s alive!
It’s been a couple of weeks now since Swift 5 has arrived, with a bunch of features, such as: ABI stability source compatibility isMultiple – a fancy technique for checking if a number is a multiple of another number. Dictionary…
Optionals in Swift explained – with a cat in a box!
If you’ve come to Swift from a language that doesn’t use optionals, you might find the concept a little strange and the syntax unfamiliar at first. Sometimes it helps to learn the unfamiliar with something familiar – in my lightning tour…
Get a continent from longitude-latitude
For a project I’m working on I needed to know if a point (latitude,longitude) was in a continent, and if so, which one! To do this, first I set up a Continent enum to work with, making it a String…
Getting the keyboard height
Some time ago I answered a question in StackOverflow comparing the keyboard height on the iPhone X and the iPhone 8: I got these heights by: 1. Adding an observer of the UIResponder.keyboardWillShowNotification notification: [sourcecode language=”javascript”] NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object:…
Lightning tour of closures in Swift
Check out this video tutorial with a lightning tour of closures in Swift. It covers: Functions as data types Basic closure syntax Trailing closures If you’re interested in more of these sorts of videos, I’ll be posting frequently over on…
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