Swift Dev Journal

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Using Top Functions Mode in Instruments to Quickly Find the Slowest Code · Swift Dev Journal

Resources for Learning Mac Development

Last update: December 2025 I’ve seen a lot of questions from people on Reddit and Slack looking for resources on Mac development in Swift. Compared to iOS development there are relatively few resources for learning to write Mac apps in Swift. I’ve collected what I found and am sharing with you. Books and Courses The book Hacking with macOS teaches Mac development by building 18 projects. TrozWare publishes the book macOS by Tutorials, where you build two SwiftUI apps and a menu bar app with AppK

Livsy Code → Learn Swift the smart way

Infinite ScrollView in SwiftUI → Livsy Code

Greetings, traveler! Some UI patterns expect a scroll view that never reaches an end. Think of a “featured” carousel on a storefront, a ticker of recent items, a carousel of songs in your player, or a background strip of logos in a landing screen. In these cases, the user should be able to keep swiping

bugfender.com

iOS Universal Links: Setup, Testing and Debugging Guide

Debugging iOS Universal Links can be trickier than it seems on the surface. Several layers have to work perfectly, and

Livsy Code → Learn Swift the smart way

Why Your @Observable Class init() Runs Multiple Times in SwiftUI → Livsy Code

Greetings, traveler! SwiftUI encourages a lightweight view layer. Views are value types, rebuilt frequently, and expected to be cheap. This mental model becomes tricky when you start storing reference types in @State, especially after adopting the Observation framework (@Observable). Note By the way, SwiftUI’s @State is now a macro, which addresses some points raised in

SwiftDifferently

The 4-Step Process I Use to Create SwiftUI Animations

Stop throwing .animation() modifiers everywhere and hoping for the best. Here's the systematic process I use to build polished animations that actually work.

Pasi Salenius (@pasi@infosec.exchange)

Attached: 1 image I’m happy enough with the HTML help bundles generated by my HelpBooks tool. The table of contents in the HTML sidebar is keyboard navigable, resizable and allows collapsing sections. Already added this to my dev Proxygen app and it’s nice. It’s all offline. The “Mavericks” theme pictured in the video is the best but there’s also “Modern” and “Tiger”. None of the toolbar items work (back/forward navigation, home, search) but that’s okay I think. https://github.com/PasiSaleni

Metin Seven (@metin@graphics.social)

Just started using Macshot, a free, open source MacOS screen capture and editing tool. I quite like it… https://github.com/sw33tLie/macshot #screenshot #ScreenCapture #editor #app #apps #tools #software #tech #technology #apple #Mac #macOS #tip #tips #FreeSoftware #free #FOSS #OpenSource

Measure App Launch Time with Instruments

Take the following steps to measure your app’s launch time with Instruments: Press Cmd-I or choose Product > Profile to profile your app. Select the App Launch template when Instruments launches. Click the Choose button. Click the Record button to start profiling. Select the item with the name of your app from the timeline pane. Press Cmd-4 to open the App Lifecycle section. The App Lifecycle section lists the app’s launch steps and how long each step took.

Add an Open Recent Menu to a SwiftUI app

Why would you need to add an Open Recent menu? The most common reason is you created an app that doesn’t use the document architecture, and you want a way for your app’s users to access recent items. Adding an Open Recent menu requires you to do the following things: Use the NSDocumentController class to track recent items. Add an @Observable class to hold the recent items so SwiftUI can update the Open Recent menu when its contents change. Using NSDocumentController to track recent items The na

Find the SwiftUI Views that Update the Most Using Instruments

When profiling a SwiftUI app with Instruments, one thing you want to know is what views update the most. If a view updates more than you expect, you want to know what causes the updates. In this article you will learn how to use the SwiftUI instrument to find the views in your app that update the most and find what triggers view updates. This article uses the new SwiftUI instrument Apple added in Xcode 26. If you are using an earlier version of Xcode, read the following article:

Create with Swift

Creating Maps in SwiftUI apps with MapKit

Learn how to integrate Maps using MapKit in modern iOS applications.

blog.ambi.se

Scale your images with Dynamic Type

Indicating Selection in macOS Menus Using SwiftUI

Explore practical ways to indicate selection in macOS menus using SwiftUI, including buttons, pickers, and toggles for both toolbar and main menu.

Measure App Launch Time with Instruments

Take the following steps to measure your app’s launch time with Instruments: Press Cmd-I or choose Product > Profile to profile your app. Select the App Launch template when Instruments launches. Click the Choose button. Click the Record button to start profiling. Select the item with the name of your app from the timeline pane. Press Cmd-4 to open the App Lifecycle section. The App Lifecycle section lists the app’s launch steps and how long each step took.

CodeWithChris

Swift Tutorial 2026: Learn Swift From Absolute Zero : CodeWithChris

Follow this free Swift tutorial to learn Swift programming from absolute zero, with 30-minute lessons, runnable code, challenges, and AI prompts.