SwiftUI: What Just Happened?

The amount of power and engineering behind SwiftUI is extraordinary. Let's breakdown what's happening when one creates a new project using it.

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Animating Images using ImageIO

Animating images is a common medium for communication in today's society. In iOS 13, Apple quietly offered us up a way to serve up .gifs or APNG files using ImageIO.

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On Launching Your Indie App

The art of launching is a mystical, debated art. Yet, in many ways it's the cornerstone of our initial success.

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Introducing Spend Stack

If I write about indie development, I suppose it's time to reveal my indie project. Many years in the making, here's Spend Stack.

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A LinkPresentation Introduction

Say hello to a new framework shipping in iOS 13 that you've likely used hundreds of times as an end user. Now, rich link previews are available to all of us.

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iOS 13: Notable UIKit Additions

Though UIKit wasn't the star of the show, its number of improvements certainly don't show it. Let's see what's new in iOS 13 for our favorite framework.

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WWDC 2019: The Pregame Quiz

iOS 13 is coming. Before Marzipan and Dark Mode show their respective faces, let's enjoy another annual pregame quiz!

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NSSecureCoding

Any application on iOS is a purveyor of data in some capacity. NSSecureCoding ensures that this data is what it says it is, and will do what it says it should do.

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I Made Some Pancakes

What can fluffy butter cakes teach me about indie development? Apparently, just what I needed to learn.

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Handling iCloud Assets

Rich media plays an important role in the mobile ecosystem. Working with them when they're located off-site requires some nuance.

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A Best in Class iOS App

What is a best in class iOS app? How are they built, and can we quantify what makes them great?

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NS_CLOSED_ENUM

Enumerations provide clarity and intent. Some change and yet others remain stagnant, and now we program effectively for either case.

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The Chart That Lies

On being realistic about the things we make, and the relationship that time has with them.

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Optimizing Images

iOS is a visual medium teeming with beautiful images in virtually every app on your phone. Important though they are, it's trivial to mismanage them from a memory and performance standpoint.

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Supporting External Displays

With the iPad Pro's USB-C support, the opportunity to support external displays in a first class manner has never been more pertinent. Doing so doesn't require much work, and the potential value add is high.

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UIGraphicsImageRenderer

For years, we've used Core Graphics to draw. Let's turn the page to modern drawing on iOS.

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iOS 12: Notable UIKit Additions

Our favorite framework for user interface creations becomes faster and a bit more nimble with iOS 12.

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WWDC 2018: The Pregame Quiz

iOS 12 beckons, but before it does - let's quiz it up over iOS versions of yesterday.

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NSPredicate

Twist and turn your way through collections and data sets with ease.

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UILayoutGuide

Spacer views often make user interface creation more palatable, but with significant drawbacks. There's a more pragmatic way.

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Connecting iOS Apps with Their Websites

As developers, marketing often escapes the lot of us. Fortnuately, Apple has made a few quick wins available to create meanginful connections between your app and its web site.

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NSMeasurement

Measuring units can be a daunting task, especially with the global audience we often serve. Let's see how Foundation can lend a hand.

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Copy on Write

Yet again, Foundation dishes out free optimizations without us having to lift a finger. Let's see how collections became a bit smarter.

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Device Check Overview

There are legitimate uses for tagging devices, but the problem is, doing so can down shady roads. Now, we've got a non shady way to go about it.

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Dealing with Home Indicator

View Controllers are notorious for the amount of responsibilities they have, but get ready for one more. Here's how to handle the home indicator.

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Random Wisdom: Part 1

In our first edition of random wisdom, let's poke around around some Objective-C. Inline blocks, how selectors work and more.

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SFAuthenticationSession

Single sign on isn't gone, in fact - it's better. Enter a new way to deal with OAuth.

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simctl

The iOS emulator is deceptively powerful. Learn about its C.L.I. to automate all sorts of things.

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iOS 11: Notable UIKit Additions

Once again, UIKit added more firepower. Beyond drag and drop APIs, there's much more to be excited about.

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WWDC 2017: The Pregame Quiz

Time to fire up the trivia machine, WWDC 17 is around the corner. What better time to test your wit against some Apple history?

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Global Functions

UIKit has everything to splash out eye candy. But it also houses several helpful utilities to help get you there.

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Tail Call Elimination

Foundation keeps caches hot and saves on precious stack memory via tail call elimination. Let's take a look at how this occurs.

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Attributes in Swift

Attributes can keep code clean and conscise without much effort. Today, let's cover some common, and uncommon, use cases.

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Swift Keywords

Swift has quite a few keywords. Let's look at every single one, what it does and provide a code sample.

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UIStackView: A Field Guide

Stack View has been pushed heavily by Apple, but sometimes its complexity overshadows its utility. A few simple tips can help ease that burden.

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NS_SWIFT_NAME

Interop is required in the world we live in. Here's an attribute in Swift that can help make things easier.

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noescape

It's an attribute you've seen hanging over closures. Let's dive into what it means, or more specifically - meant.

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iOS True Confessions

There is no developer who knows it all, and in our industry imposter syndrome runs rampant. So, let's break those walls and celebrate all that we don't know.

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Consuming and Transforming Arrays

The Swift Stand Library offers up several differeny ways to work with arrays. From sorting to sifting, almost every use case is covered efficiently.

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Leveraging Swift Enums for Quick Actions

Quick Actions are a staple component of a first class 3D Touch experience. Implementing them using Swift's enumerations makes for a pragmatic approach.

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Initialization with Closures

More than just an anonymous function, Swift's closures are extremely versatile. One such use case for them is initialization.

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On Learning iOS

iOS, once a newly minted discipline, is now a large world. It's intimidating to get started, so here's my simple take on how to get going quickly.

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#keyPath

Selectors are a part of iOS development daily. They can also be a common source of frustrating bugs, but #keyPath is here to help.

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WWDC 2016: The Pregame Quiz

It's our favorite time of the year, dub dub. Let's kick it off with some Apple trivia.

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Swift 3 Feature Highlight

Our favorite open source language is changing at a rapid pace. Here, we'll check out some of my favorite additions that landed in Swift 3.

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Access Control

Abstraction is a tent pole component of modern programming. Swift's robust tooling for access control can help us enforce it.

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A Swift Refactor

Swift offers us several novel ways to refactor our code. Follow along as we embark on such a task on some fictional code.

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iOS Citizenship: Reacting to Low Power Mode

It's a term you've likely heard in the development community - being a good citizen. What does it mean, and how can we do just that?

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iOS Architecture Patterns: Part 3

Our third and final discussion on common iOS archiecture patterns, and perhaps the most important. Let's chat MVC.

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iOS Architecture Patterns: Part 2

Our second discussion on iOS architecture patterns. Here's how delegation is imprinted across Cocoa Touch.

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iOS Architecture Patterns: Part 1

Our first discussion over iOS architecture patterns. Let's peer into the world of target-action.

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ARC

Automatic reference counting debuted several years ago and ushered in a new era of memory management. But, how does it work with Swift?

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Initialization

If you're coming from Objective-C or are new to Swift, the way its initialization works can be confusing. Diving into the particulars is a worthwhile effort.

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Protocol Extensions

It's possible to enhance a wide family of objects with protocol extensions. Today we'll try and see how its possible.

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Option Set

Option Sets solve a large swath of problems, but you may not think to use them at first. Looking at how they work and why their useful might change your mind.

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Javascript

Javascript and...Swift? It works better than you might think, and for more than just parlor tricks.

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Error Handling

Dealing with errors is usually a developer's favorite task to procrastinate against. But it shouldn't be, and even though Swift's inplementation is differnt - it's robust.

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Guard

More than an _if_ statement, this simple construct makes code safer and readable. But when do you use one or the other?

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Defer

More than an _if_ statement, this simple construct makes code safer and readable. But when do you use one or the other?

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Quality of Service

Threading, concurrency and parallelism can be a sticky subject. Thankfully, Foundation has an API to make everything safer.

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Objective-C in 2015

Apple has decreed that it's Swift's world and Objective-C is just living in it. Paradoxically, it's almost made it better than it's ever been.

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Pattern Matching

Pattern matching with Swift yields concise code when it otherwise might be a bit more convoluted. Here's how it works.

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Protocol Oriented Programming

The infamous WWDC session introduced us to 'Protocol Oriented Programming'. Really, though - what is it?

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WWDC 2015: The Pregame Quiz

Now that WWDC is here, let's start a new annual tradition. It's time for the very first WWDC Pregame Quiz.

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Definitive Initialization

Swift goes to great lengths to ensure values are initialized before they are used. The reasons how vary from API design to the way LLVM works - let's chat about this process called definitive initialization.

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Objective-C and Swift Together

We've now hit the inflection point where your Objective-C projects must mix with Swift, or vice-versa. Here's how my first experience with it went.

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bool

The boolean variable, perhaps the most simple implementation in Computer Science - or is it? Swift's version can do more than just spit out 0 or 1.

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set

The array is a beautiful cornerstone of data structures, but sometimes we call upon its close cousin - the set. Here's how Swift's version works.

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int

Integers are used in almost every iOS app. With Swift, they've become even more useful.

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Looping and Iteration

It's one of the first thing green programmers learn - looping and iteration. Swift has made it easy and versatile.

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Casting

We'd all just as soon let the compiler do all the work, but sometimes casting is unavoidable. Here's how it can be used with Swift.

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NSURLComponents

Picking apart and composing URLs becomes a more common programming task by the day. Foundation has a class specifically built for such situations.

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Tuples

Tuples can be a short stand in for tiny data constructs. When used properly, they can make your code a bit more opportunistic.

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