Support drag to reorder in a UITableView using a diffable datasource.
Check out a sample from my book. This one covers one of the five main topics, Accessibility.
iOS 15 is coming in hot! Check out new ways to decode images, present sheets and more.
Apple has already shipped amazing things in the past month, so the floor is cleared. Let's gear up for a crazy dub dub with another official quiz!
My first digital launch is in the books. How did the decision to go early access go?
My next big project is ready for beta launch. One, gigantic book covering everything I know about iOS.
Create a basic UICollectionView with a collapsing section.
Respond to keyboard presses.
Add some keyboard shortcuts.
iCloud is the gift that keeps on giving - both good and bad. Let's see how to leverage one of its best aspects today.
Tough times are no fun, but like anything else they provide a unique learning experience. Here's what I've recently picked up from mine.
Create a basic shortcut that will show in the Shortcuts app.
A tour of different technologies contributed to my newest mini project, The Daily iOS.
We don't all hit homeruns on the first go around. Today, I celebrate the misses.
The popular CSS framework came to my rescue when redesigning my site. Here's how it went.
Setup diffable datasource with UITableView.
Expose data from Spotlight search using the Core Spotlight framework.
Expose data from Spotlight search using NSUserActivity.
A chapter of my professional life comes to an end. Spend Stack has been acquired and will get the full team it deserves!
Indie development is about having a strong mental game as much as it is strong development skills.
Spend Stack has been out one year! Today, I take a second to reflect on all that has happened since it released.
If you thought UIKit was getting pushed to the side with the rise of SwiftUI, you were wrong. There's a lot that's new, improved or revamped - let's take a look.
And here we go - iOS 14, SwiftUI tweaks and Catalyst fixes are on the way. It's time for another WWDC Pregame Quiz!
Spend Stack just recently wrapped up its first big update. Turns out, they are critical to paid up front apps.
Creating a feature is a process that should be as scrutinized as much as it is celebrated. Here's how I go about it in my own indie apps.
Lately, I've been researching more about effective Combine techniques. Today, I start in on utilizing Futures.
COVID-19 and your productivity. There are inexorably linked, so let's talk about it.
Handling the keyboard on iOS is a rite of passage if not also a little tiresome. Fortunately, Combine makes it better.
Spend Stack was selected by Apple to be included as a retail demo on iPhones & iPads across the globe. Here's what the process was like.
In my quest to pretty up some of the rougher edges of Spend Stack, today I turn my attention to styling my interface in Master-Detail Views. Easy to describe, harder to do.
Another core piece of functionality arrived in Swift 5.1 - built in diffing. Let's take a look.
Empty views are a critical piece of user experience on iOS. Today in tech notes, I explore how this might be done with diffable datasource.
I've often written about what it takes to be considered a best in class app on iOS. So, how am I doing personally according to my own definition?
Xcode Previews for SwiftUI has quite literally changed a decade old workflow. Here are the techniques I currently live by.
What indie dev isn't short on time, wants to ship a new app or write that book? It only happens with realistic goals which beget good habits - here's how I work to create, and foster, good ones.
There's a lot of discussion in our industry about whether or not designers should learn to code. But, what about the other direction?
The amount of power and engineering behind SwiftUI is extraordinary. Let's breakdown what's happening when one creates a new project using it.
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.
The art of launching is a mystical, debated art. Yet, in many ways it's the cornerstone of our initial success.
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.
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.
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.
iOS 13 is coming. Before Marzipan and Dark Mode show their respective faces, let's enjoy another annual pregame quiz!
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.
What can fluffy butter cakes teach me about indie development? Apparently, just what I needed to learn.
Rich media plays an important role in the mobile ecosystem. Working with them when they're located off-site requires some nuance.
What is a best in class iOS app? How are they built, and can we quantify what makes them great?
Enumerations provide clarity and intent. Some change and yet others remain stagnant, and now we program effectively for either case.
On being realistic about the things we make, and the relationship that time has with them.
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.
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.
For years, we've used Core Graphics to draw. Let's turn the page to modern drawing on iOS.
Our favorite framework for user interface creations becomes faster and a bit more nimble with iOS 12.
iOS 12 beckons, but before it does - let's quiz it up over iOS versions of yesterday.
Twist and turn your way through collections and data sets with ease.
Spacer views often make user interface creation more palatable, but with significant drawbacks. There's a more pragmatic way.
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.
Measuring units can be a daunting task, especially with the global audience we often serve. Let's see how Foundation can lend a hand.
Yet again, Foundation dishes out free optimizations without us having to lift a finger. Let's see how collections became a bit smarter.
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.
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.
In our first edition of random wisdom, let's poke around around some Objective-C. Inline blocks, how selectors work and more.
Single sign on isn't gone, in fact - it's better. Enter a new way to deal with OAuth.
The iOS emulator is deceptively powerful. Learn about its C.L.I. to automate all sorts of things.
Once again, UIKit added more firepower. Beyond drag and drop APIs, there's much more to be excited about.
Time to fire up the trivia machine, WWDC 17 is around the corner. What better time to test your wit against some Apple history?
UIKit has everything to splash out eye candy. But it also houses several helpful utilities to help get you there.
Foundation keeps caches hot and saves on precious stack memory via tail call elimination. Let's take a look at how this occurs.
Attributes can keep code clean and conscise without much effort. Today, let's cover some common, and uncommon, use cases.
Swift has quite a few keywords. Let's look at every single one, what it does and provide a code sample.
Stack View has been pushed heavily by Apple, but sometimes its complexity overshadows its utility. A few simple tips can help ease that burden.
Interop is required in the world we live in. Here's an attribute in Swift that can help make things easier.
It's an attribute you've seen hanging over closures. Let's dive into what it means, or more specifically - meant.
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.
The Swift Stand Library offers up several differeny ways to work with arrays. From sorting to sifting, almost every use case is covered efficiently.
Quick Actions are a staple component of a first class 3D Touch experience. Implementing them using Swift's enumerations makes for a pragmatic approach.
More than just an anonymous function, Swift's closures are extremely versatile. One such use case for them is initialization.
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.
Selectors are a part of iOS development daily. They can also be a common source of frustrating bugs, but #keyPath is here to help.
It's our favorite time of the year, dub dub. Let's kick it off with some Apple trivia.
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.
Abstraction is a tent pole component of modern programming. Swift's robust tooling for access control can help us enforce it.
Swift offers us several novel ways to refactor our code. Follow along as we embark on such a task on some fictional code.
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?
Our third and final discussion on common iOS archiecture patterns, and perhaps the most important. Let's chat MVC.
Our second discussion on iOS architecture patterns. Here's how delegation is imprinted across Cocoa Touch.
Our first discussion over iOS architecture patterns. Let's peer into the world of target-action.
Automatic reference counting debuted several years ago and ushered in a new era of memory management. But, how does it work with Swift?
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.
It's possible to enhance a wide family of objects with protocol extensions. Today we'll try and see how its possible.
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.
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.
More than an _if_ statement, this simple construct makes code safer and readable. But when do you use one or the other?
More than an _if_ statement, this simple construct makes code safer and readable. But when do you use one or the other?
Threading, concurrency and parallelism can be a sticky subject. Thankfully, Foundation has an API to make everything safer.
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.
Pattern matching with Swift yields concise code when it otherwise might be a bit more convoluted. Here's how it works.
The infamous WWDC session introduced us to 'Protocol Oriented Programming'. Really, though - what is it?
Now that WWDC is here, let's start a new annual tradition. It's time for the very first WWDC Pregame Quiz.
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.
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.
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.
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.
Integers are used in almost every iOS app. With Swift, they've become even more useful.
It's one of the first thing green programmers learn - looping and iteration. Swift has made it easy and versatile.
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.
Picking apart and composing URLs becomes a more common programming task by the day. Foundation has a class specifically built for such situations.
Tuples can be a short stand in for tiny data constructs. When used properly, they can make your code a bit more opportunistic.