In this article, I'll look at the the biggest problem with non-declarative views and how frameworks have slowly become more declarative, over time. I'll take a guess at what approach a declarative view framework from Apple might use – although keep in mind…

The purpose of this article is to describe and explore a foundational concept in Metal: vertex descriptors. Vertex descriptors are the glue between your application code (written in Objective-C or …

Pop quiz: in a UIButton, how do you set a padding of 10pt between the image and the title? I had to do this at work recently, and I was surprised at how hard it was to reason about. There are several posts talking about this topic (including this one which…

TL;DR : Just want the code? Click here This post assumes you have a basic grasp of how to use URLSession and that URLSession is asynchronous. There might be scenario where your app have to download external resource files from the internet, as URLSession…

Since time immemorial, iOS developers have been perplexed by a singular question: ‘How do you resize an image?’ This article endeavors to provide a clear answer to this eternal question.

Extensible in different ways

Feedback helps people know what an app is doing, discover what they can do next, and understand the results of actions. This week I am going to talk about the Haptic Feedback Engine which provided by Apple in most of the devices.

Self-documenting code in Swift makes your code easier to understand by using extensions, type aliases, and by not using trailing closures.

I recently developed an iOS application that compares two HTTP libs (NSURLSession and Alamofire) and I decided to use an A/B testing tool…

One of those difficult things for even experienced developers to understand is Automatic Reference Counting, or ARC. It is how Swift manages and conserves memory automatically.  Take a look at…

Power, flexibility, and encapsulation all rolled into one

Making sure that your code follows swift coding styles and conventions can be a tedious task. You can easily automate this process by using SwiftLint.

One major benefit of Swift’s protocol-oriented design is that it enables us to write generic code that’s compatible with a wide range of types. Let’s take a look at how we can wrap the Sequence protocol in generic containers, that’ll let us encapsulate various…

Software development best practices prescribe strict separation of configuration from code. Learn how you can use xcconfig files to make your Xcode projects more compact, comprehensible, and powerful.

When to use weak self? When to use unowned self? How to prevent retain cycles? Everything explained with code examples and detailed explanations.

Soroush discusses abstraction — what it is, and what it isn’t. He steps through the process of taking code that went from good to bad, and find ways to make it good again. How do we build an abstraction from code that isn’t abstract? What qualities are we…

Protocol-oriented programming is strongly recommended in the Swift community, and Apple has given a lot of guidance on how to use it in your everyday code. However, there has not been a lot of attention on when it is not appropriate, and what to do in that…

In this tutorial, you will learn about the File Provider framework and how to implement your own File Provider extension to expose your app’s own content.

Leverage the benefits of Coordinators and Storyboards.

When thinking about the great language features of Swift, few people think about `typealias` first. However, there're many situations where they can become particularly useful.