Save time with this fantastic feature — Motivation Learn how you can easily find a commit that introduced a bug in an iOS application. The following technique is helpful if you work with many developers on a large repository with daily complex commits. …

A look at the lesser-known framework — DeveloperToolsSupport is a little framework introduced in iOS 14+ / macOS 11+. It contains only one protocol and one structure. It enables developers to add custom SwiftUI views and view modifiers to the Xcode library. Xcode Library Open the Xcode library with keyboard shortcut shift-command-L (⇧⌘L)

I told you about Hot Reloading a SwiftUI App in my previous blog post. In this blog post, I will tell you how to inject code that is not bound to a UI representation. …

Do you work on an open-source project, and do you want to give your consumers confidence in the quality and management of your project? You can achieve this, at no cost, by getting and showing off the OpenSSF Best Practices Badge. The Open Source Security Foundation (OpenSSF) Best Practices Badge…

Change code and instantly see the updates in the iOS simulator without compiling your SwiftUI app! You need Inject, a Swift Package created by Krzysztof Zabłocki InjectionIII, a macOS application for the heavy lifting (i.e. …

Learn how to print environment values efficiently for debugging purposes — This blog post will explain how to print environment values efficiently for debugging purposes. Therefore, you can inspect which actual value is used on a specific view hierarchy level. A quick recap about SwiftUI Environment SwiftUI uses the environment to pass values for pre-defined types down the view hierarchy. By using @Environment property wrapper, we can…

In this blog post I help app developers to understand the terminology of a Swift Package and how to integrate a more complex structured Swift Package in an iOS application. The simplest package structure, created by the swift package init command, consists of a package with a single product (type…

This blog post is targeting SDK developers who bundle custom fonts in their package/library/framework and these fonts shall be used in reusable SwiftUI views. I will explain an issue observable when using font weight related view modifiers (like bold) on a non-registered custom font. Let’s assume you added the Open…

In this blog post I tell you how to test object substitution attacks and how using NSSecureCoding can prevent such attacks. I will also share example code on how to use NSKeyedArchiver and NSKeyedUnArchiver either with or without NSSecureCoding. explain how to archive / unarchive an object into different formats…