When Xcode runs your unit tests, it uses the App as a host for the tests. The tests only run after the App has finished launching. Loading core data, networking or other setup work you do from the App delegate slows down your unit tests. Here’s a quick tip…

When writing automated tests, many of us have a tendency to focus on verifying that our code behaves correctly under ideal conditions, but we should really also test how our code behaves when something goes wrong. This week, let’s take a look at how unit…

Learn how to create a voice recording app, that has audio visualization as well as a record button just like Apple’s Voice Memos app.

A little extra clarity goes a long way

Concurrent code can come in many different shapes and forms. Depending on what we’re trying to achieve, the abstraction that’ll prove to be the best fit might vary quite a lot from use case to use case. One such abstraction is Tasks, and this week, let’s…

Strings are everywhere. We all use strings everyday. In Swift `String` is a very powerful type. One of the features it had available since the beginning is the string interpolation. With it we can embed any Swift expression inside the string literal instead…

The release of Swift 5 is coming with Xcode 10.2 and brings some updates to the String API in the standard library. Here’s a look at the new character properties that allow you to test for a number of useful Unicode properties.

Reflection is a common programming language feature that enables us to inspect, and work with, the members of a type — dynamically, at runtime. That may seem at odds with Swift’s heavy focus on compile-time validation — but this week, let’s take a look at…

One way to make a code base easier to navigate, while still maintaining a solid overall structure, is to inline functionality whenever two pieces of code are heavily related. This week, let’s take a look at how that can be done using inline types and functions…

https://medium.com/@vixentael/popular-note-taking-apps-share-these-security-flaws-security-tips-for-developers-326180e41329

One really elegant aspect of Swift’s design is how it manages to hide much of its power behind much simpler programming constructs. Pattern matching is one source of that power, especially considering how it’s integrated into many different aspects of the…

In this article we will be generating strong passwords with AutoFill and store them in the keychain so they can easily be used when logging in.

The UserDefaults API can at first glance appear to be somewhat limited. However, it turns out that the power of UserDefaults extends far beyond simply storing and loading basic value types. This week, let’s take a look at what some of that power comes from…

Unwind segues in iOS can be quite confusing. Unlike their forward counterpart, they are based on a more complicated mechanism and different rules. That usually complicates their setup. Moreover, many wonder why you should use an unwind segue when you can…

There might be occassion that your app got launched by user tapping push notification in the control center. Sometimes we might want to do a certain action if the app is launched from push notification, say move to a certain view controller or call a certain…

Learn how to create a pod from scratch and utilize Travis and Codecov to make the pod robust.