标签：#Swift

In the age of "Cloud Everything," our most sensitive data—our heartbeat, our sleep cycles, our stress levels—often ends up on a server somewhere in Northern Virginia. But what if we could keep that data where it belongs? On your device. Today, we're diving deep into Edge AI and On-device LLMs . We will build a privacy-centric health coach that uses MLX-Swift to run Llama-3 directly on your iPhone's Apple Silicon. We’ll be pulling real-time Heart Rate Variability (HRV) data from the HealthKit API and generating semantic health summaries without a single byte ever leaving your phone. 🚀 Why Edge AI? 🛡️ When dealing with Private AI and sensitive medical metrics, the "Cloud-First" approach is a liability. By leveraging MLX-Swift and the Unified Memory Architecture of the A17 Pro/A18 chips, we achieve: Zero Latency : No round-trip to a server. Total Privacy : Your data stays in the Secure Enclave. Offline Capability : Health insights in the middle of the woods? Yes. The Architecture 🏗️ The data flow is simple but powerful. We fetch raw samples from HealthKit, preprocess them into a prompt-friendly format, and feed them into a quantized Llama-3 model managed by the MLX framework. graph TD A[iPhone HealthKit Store] -->|Fetch HRV Samples| B(Swift Data Controller) B -->|Normalize & Format| C{MLX-Swift Engine} D[Llama-3-8B-4bit Model] -->|Load Weights| C C -->|Local Inference| E[Neural Engine / GPU] E -->|Semantic Summary| F[SwiftUI Dashboard] F -->|User Feedback| A Prerequisites 🛠️ To follow this advanced tutorial, you'll need: Xcode 15.4+ and a physical iPhone (iPhone 15 Pro or newer recommended for 8GB+ RAM). MLX-Swift : Apple's framework for machine learning on Apple Silicon. Llama-3-8B (4-bit quantized) : To fit within the iOS memory footprint. HealthKit Permissions : Configured in your Info.plist . Step 1: Accessing HealthKit Data 💓 First, we need to grab that juicy HRV data. Heart Rate Variability is a key indicator of autonomic nervous system stress. import HealthKit c

The notch on a MacBook is strange real estate. It is always there. It sits at the top of the screen, close to the menu bar, close to system controls, close to whatever you are doing. But most of the time it is treated like a cutout to design around instead of a place software can use. That felt like a missed opportunity. So I built SwiftNotch , a macOS menu bar app that turns the notch area into an expandable productivity dashboard. Hover near the notch or press Option + Space , and the quiet black shape becomes a small command center for widgets, files, media, shortcuts, developer tools, and window actions. Website: swiftnotch.xyz Demo video: Launch note: SwiftNotch 1.x is free during beta . I want early Mac users to try the full experience, share feedback, and help shape the app before SwiftNotch 2.0 introduces paid plans. The idea I did not want to build another large dashboard that asks you to leave your current app. The goal was the opposite: make useful tools available in the smallest possible space, without breaking flow. The notch is perfect for this because it already behaves like a visual anchor. You know where it is without thinking. If it can expand only when needed, it becomes a temporary interface layer instead of another permanent panel. SwiftNotch starts collapsed. When activated, it opens into a compact dashboard with the widgets and actions you choose. What SwiftNotch does The current app includes 31 built-in widgets across productivity, system utilities, media, automation, and developer workflows. Some examples: Media Control for Spotify, Apple Music, VLC, YouTube, and browser players Shelf for drag-and-drop file staging, quick sharing, paths, iCloud actions, and zip workflows Clipboard History for snippets, links, and quick paste Calendar Events , Reminders , Notes , Weather , World Clock , and Pomodoro Quick Toggles for Wi-Fi, Bluetooth, Dark Mode, and volume Window Snapping with layouts for halves, thirds, quarters, and custom grids Developer H

Okay. This one is going to feel weird at first. I'm going to warn you in advance so you don't think...

If you've ever localized an iOS or macOS app, you know the drill: you've got a .plist file full of UI strings sitting in Base.lproj , and now you need the same file in fr.lproj , th.lproj , de.lproj ... and so on for every language you support. You can pay for a translation service, hand it to a freelancer, or sit there manually retyping strings into fifteen copies of the same file. I didn't want to do any of those things, so I spent a day building pListTranslatorApp — a small SwiftUI macOS app that opens an Xcode plist, finds the string values you want translated, batch-translates them using Apple's built-in Translation framework, and writes out a ready-to-use localized plist. It's free, it runs entirely on-device, and it's now sitting on GitHub for anyone who wants it. The constraint that shaped the whole thing I'm developing on a MacBook Air with a 256GB SSD and 8GB of RAM — not a lot of headroom. That ruled out a couple of obvious approaches: Cloud translation APIs (DeepL, Google Cloud Translate, etc.) work well, but even a generous free tier means an external dependency, an API key to manage, and a network round-trip for something that's ultimately just short UI strings. Downloading a pile of on-device language models "just in case" eats real disk space fast — Apple's Translation framework models are shared system-wide across apps, which helps, but they still add up if you're not paying attention. So the app leans entirely on Apple's Translation framework , downloading exactly one language pack at a time, on demand, and lets you delete it once you're done with that language. What it actually does Open a plist. Pick any Xcode .plist via a standard file importer. Choose which keys to translate. Originally I hardcoded it to look for a key called itemTitle , but that's obviously too narrow for anyone else's project — so it's now a comma-separated text field. Type itemTitle, title, label and it'll pick up all of them, anywhere in the plist's nested dictionaries and

What if you could take an existing class and say "I want everything this already does, plus a few...

Part 2 — Search, palette, and settings Level: Intermediate · Time: ~35 minutes · Builds on: Part 1 — Contacts app Part 1 got you shipping. This one gets you productive . We'll take the Contacts app and give it the ergonomics real users expect: an adaptive sidebar that becomes a tab bar on iPhone, a command palette on ⌘K, honest loading states while data comes in, and a proper settings screen. Zero #if os guards. Zero re-rolled controls. What we're adding An adaptive shell — DFSidebar on regular width, DFTabBar on compact. A search field at the top of the list, filtering as you type. A ⌘K command palette exposing every action in the app. Skeleton loaders for a simulated slow fetch. A settings screen — notifications toggle, density picker, sync-interval slider, pinned-since date picker, beta-features checkbox. Per-component token overrides on the settings screen, without forking the theme. 1. Shell: sidebar on wide, tab bar on narrow The routing decision — sidebar vs tab bar — should be data, not a view hierarchy. Enumerate your sections once, then feed the two components the shapes they want. API note. DFSidebar uses Binding<String?> and is just the sidebar view — you compose the detail pane yourself (naturally via NavigationSplitView ). DFTabBar uses Binding<String> (non-optional) and does take a content builder that receives the selected ID. Both use plain String IDs, so we keep a simple Section enum and pass rawValue at the boundary. enum Section : String , CaseIterable , Identifiable , Hashable { case contacts , favorites , archive , settings var id : String { rawValue } var label : String { switch self { case . contacts : "Contacts" case . favorites : "Favorites" case . archive : "Archive" case . settings : "Settings" } } var icon : String { switch self { case . contacts : "person.2.fill" case . favorites : "star.fill" case . archive : "archivebox.fill" case . settings : "gear" } } static func from ( _ id : String ?) -> Section { id . flatMap ( Section . init (

Okay so. We need to talk about classes. If you've been following along with this series, you're...

I've been using TablePlus for years. It's good — but the connection limits on older licences drove me mad, and most alternatives are either Electron apps or haven't been updated since 2019. So I built my own. What is Stratum? Stratum is a native macOS database GUI — written in Swift, not wrapped in Electron. It connects to MySQL, MariaDB, PostgreSQL, and SQLite. What made me actually build it Three things: 1. Connection limits. TablePlus caps connections on older licences. Stratum has none. 2. Electron alternatives. Beekeeper Studio is good but it's an Electron app. On a Mac, that matters. 3. The MySQL setup friction. Most tools require you to install extra dependencies. Stratum connects natively — no brew install, no extra setup. What it does Table browser with inline editing — add, edit, delete rows without SQL Server-side pagination — stays fast on tables with 100k+ rows Query editor with schema-aware autocomplete Visual schema designer — create tables, add columns without writing DDL Full SQL export — DROP + CREATE + batched INSERTs iCloud sync for connections and snippets Laravel Valet auto-detection Import connections from TablePlus in one click SSH tunnelling The tech Built with SwiftUI and Swift 6. The PostgreSQL driver uses PostgresNIO. The MySQL driver implements the MySQL wire protocol directly over Network.framework — no Homebrew dependency, works inside the App Sandbox. Where it is now Currently in free beta. One-time purchase planned for the Mac App Store — no subscription. → stratum.mwn-digital.uk Happy to answer questions about how it's built.

If you've searched the App Store for a reliable third-party QWERTY keyboard on iOS, you know how that ends. Some are abandoned. Some are ad-riddled. Some feel like they were ported from Android and never touched again. The good ones are the ones that don't ship features so much as they don't crash. The system keyboard is fine. It's fine because Apple has been iterating on it for fifteen years. Nobody else has. Third-party keyboards on iOS are a graveyard. I'm building one that isn't. It's called Diction. Most people know it as a voice keyboard, and that's what I lead with, but under the hood it's a serious low-level QWERTY project too. This post is about that half of it, because that's the half nobody talks about. Why third-party QWERTY on iOS is a graveyard Building a good keyboard extension on iOS is hard. There's a strict memory ceiling. There's a permission dance the user has to opt into. There's no keychain access, no meaningful background work, and the extension can be killed the moment iOS decides it needs the RAM. Most keyboard makers ship a first version to check the box, then abandon it once they see how much work maintaining it takes. The result is what you see on the App Store today. Every third-party keyboard I've tried on iOS fails on at least one of these: Speed. You type a letter, the letter arrives. That's it. If there's a hitch you can feel, the keyboard is broken. Half the ones I've tried have a visible delay on every keystroke. Predictability. If you correct the same word back three times, that word should be yours. The keyboard should stop fighting you. Most never do. You fight the same wrong correction for a year. Recovery. iOS keyboard extensions are memory-constrained. Bad ones freeze under pressure. When you rapid-switch between apps, half the third-party keyboards on the store will lock up until you kill and reopen the host app. Autocorrect that isn't from 2014. Fix the obvious typos. Split words that ran together. Complete contractions. Ge

The 2027 release of SwiftData introduces support for persisting custom and third-party types via Codable, along with the ability to organize data into SwiftUI list sections. It also adds new capabilities for observing data store changes through ResultsObserver and HistoryObserver. By Sergio De Simone

Rendering a big image on iOS is one of those things that looks trivial until your app gets killed by the OS mid-export. CGContext , draw, makeImage() , done — except the moment the output gets large, that innocent-looking pipeline quietly asks for gigabytes of RAM and iOS terminates you. I hit this wall building Mozary , an iOS app that packs 100+ photos into a single giant picture (a photo mosaic). In v1.1.0 I finally killed the "high-resolution export crashes with out-of-memory" bug for good. The fix: stop putting the canvas in RAM at all. Put it in a memory-mapped file and let the OS page it to disk. RAM usage dropped from "4.8 GB, please die" to a few dozen MB, flat, regardless of output size. This post is the walkthrough — with the actual Swift. If you've ever seen Core Graphics blow up on a big image (mosaics, collages, stitched panoramas, high-res rendering — same trap), this is for you. TL;DR A non-compressed bitmap costs 4 bytes/pixel . A 1.2-gigapixel image = ~4.8 GB of RAM just for the canvas. CGContext(data: nil, ...) allocates that in RAM. context.makeImage() then copies it again . Double death. Back the canvas with a memory-mapped file ( mmap ). Writes transparently page out to disk and don't count against your app's memory footprint . Wrap that same mapping in a CGImage via CGDataProvider — zero copy — and stream it straight to a JPEG on disk. Never call makeImage() . Decode source tiles at their draw size , not full size. Because you now spend disk instead of RAM: add a free-space pre-flight check and clean up temp files after a crash. Let's dig in. The problem: "compressed file size" is a lie about memory Mozary lays photos out on a grid. A typical high-res export is a 200 × 267 grid with each tile drawn at 150px : width: 200 × 150 = 30,000 px height: 267 × 150 = 40,050 px That's ~1.2 gigapixels . Here's the part people underestimate: the final JPEG is only a few hundred MB to ~2 GB because JPEG is compressed . But while you're drawing, the canvas i

GitHub热门项目 | Show usage stats for OpenAI Codex and Claude Code, without having to login. | Stars: 16,922 | 377 stars today | 语言: Swift

"I'll just write a quick button style... and a text field with validation... and a card component..." Two weeks later you have a bespoke design system that only half the app uses, three slightly different buttons, and nothing shipped. If you're building with an AI coding agent, the drift problem is worse, not better. Ask Claude, Cursor, or Codex to "add a settings screen" three separate times and you'll get three different paddings, three different corner radii, and a button style that quietly forked itself somewhere around commit 40. Agents are great at writing plausible SwiftUI and bad at remembering what the rest of your app already decided. DesignFoundation is an open-source SwiftUI package that gives you a token-based theming engine, 25 components, and 6 feedback/overlay modifiers that all read from the same theme. You set it once at the app root, and everything underneath updates. That's the whole idea — and it ships with CLAUDE.md , AGENTS.md , and Cursor rules already written, so an agent working in your repo reaches for DFButton instead of inventing a new one. In this tutorial you'll go from zero to a themed, consistent SwiftUI UI — without writing a single custom button style. What We're Building By the end you'll have: A working app that uses DesignFoundation's theme system A themed form with inputs, validation states, and feedback components A custom theme built from tokens An understanding of how the style system composes Requirements: Xcode 16+, iOS 18+ / macOS 15+ target, Swift 6. Installation Via Xcode File → Add Package Dependencies Paste https://github.com/NerdSnipe-Inc/design-foundation Set the version rule to Up to Next Major from 1.0.0 Add DesignFoundation to your target Via Package.swift dependencies : [ . package ( url : "https://github.com/NerdSnipe-Inc/design-foundation" , from : "1.0.0" ) ], targets : [ . target ( name : "YourApp" , dependencies : [ "DesignFoundation" ]) ] Step 1: One Line Instead of a ThemeManager Singleton Every app that

Part 2 of 2. This tutorial builds on Part 1 — DesignFoundation core . If you haven't added the base package and theme yet, start there. The core package gives you tokens and primitives. DesignFoundationPro adds what comes next — 29 blocks, 47 screens, 18 navigation shells, and 9 runnable composition examples across auth, onboarding, charts, data tables, and full product verticals. The docs claim ~87% fewer lines of code versus building from scratch. That's the bet. This matters even more if an AI coding agent is doing the building. Ask an agent for a CRM screen and a settings screen in the same session and, without guardrails, you'll get two different takes on spacing, two different sidebar behaviors, and a table that's native on Mac in one screen and a scroll view pretending to be a table in the other. Pro ships with that guardrail already in place — more on that in Where to go from here. How the two packages relate Pro sits on top of Foundation and re-exports it. Import only DesignFoundationPro and you get everything from both: YourApp your models, data, routing DesignFoundationPro 29 blocks · 47 screens · 18 shells · 9 examples DesignFoundation tokens · primitives · validation · theme engine · MIT Access: Foundation is MIT and public. Pro is a commercial add-on — repo access is granted after purchase. Licenses are lifetime (no subscription); annual updates are $39/year and entirely optional. Pricing: $149 individual · $449 team (up to 5 devs). Before buying, browse everything in DFPlayground — a free macOS app that lets you preview all 29 blocks, 47 screens, and 18 shells with live theming. Step 1: Add DesignFoundationPro Pro declares Foundation as its own dependency and re-exports it via @_exported import DesignFoundation . Add only the Pro package — Foundation comes with it automatically. The Pro repo URL is provided after purchase — contact nerdsnipe.inc@gmail.com or visit the Pro page to get access. dependencies : [ . package ( url : "https://github.com/NerdS

Originally published at ffmpeg-micro.com You need server-side video processing in your Swift app. Maybe you're building a Vapor backend that transcodes user uploads, a macOS utility that batch-converts media files, or a command-line tool that generates thumbnails. FFmpeg is the standard tool for the job, but getting it into a Swift project isn't as simple as adding a package dependency. Running FFmpeg from Swift with Process Swift's Foundation framework provides the Process class for running external commands. If FFmpeg is installed on the machine, you can shell out to it directly: import Foundation let process = Process () process . executableURL = URL ( fileURLWithPath : "/opt/homebrew/bin/ffmpeg" ) process . arguments = [ "-i" , "input.mp4" , "-c:v" , "libx264" , "-crf" , "23" , "-preset" , "medium" , "-c:a" , "aac" , "-b:a" , "128k" , "output.mp4" ] let pipe = Pipe () process . standardOutput = pipe process . standardError = pipe try process . run () process . waitUntilExit () let data = pipe . fileHandleForReading . readDataToEndOfFile () let output = String ( data : data , encoding : . utf8 ) ?? "" print ( output ) guard process . terminationStatus == 0 else { fatalError ( "FFmpeg failed with exit code \( process . terminationStatus ) " ) } This works on macOS and Linux. Install FFmpeg with brew install ffmpeg on macOS or apt-get install ffmpeg on Ubuntu, point executableURL at the binary, and you're running. But you own that FFmpeg install on every machine. On Linux servers, you're managing the binary across deploys. On macOS CI runners, you're adding Homebrew steps to your build pipeline. And on iOS, Process doesn't exist at all. Processing Video via Cloud API (No FFmpeg Install) Skip the local binary entirely. FFmpeg Micro exposes full FFmpeg capabilities through a REST API. Send a video URL, pick your settings, get processed video back. If you're familiar with how this works in Node.js or Kotlin , the pattern is identical. Here's the basic flow using URLSe

GitHub热门项目 | macOS dictation app | Stars: 1,678 | 494 stars this week | 语言: Swift

When I started learning iOS development, I thought the hardest part would be writing Swift code. I...

Announced at WWDC 2026, the latest SwiftUI release brings a new Document protocol for efficient disk access and snapshot-based updates, along with improved APIs for reordering items in lists, grids, and sections. In addition, it expands presentation features, such as swipe actions on any view, better AsyncImage caching, and lazy state initialization for Observable types to boost performance. By Sergio De Simone

The idea came from an extremely serious game of hide and seek with my cousins. We were adults, which made it ridiculous, but also strangely perfect. Someone was hiding behind a couch in plain sight, surviving only because the seeker did not look carefully enough. That made me wonder: what if looking carefully was not enough? What if the seeker could not freely look around the room? What if they could only see the world through their phone screen, while virtual obstacles blocked parts of their view? That became the core idea behind AR Hide and Seek: a local multiplayer hide and seek game where 2-5 players use the space they are already in. The hiders physically hide somewhere in the room, while the seeker views the environment through an iPhone. The phone fills the space with digital clutter, making familiar rooms harder to read. One phone. One seeker. Real hiding places. Virtual obstacles. Why LiDAR? LiDAR on iPhone Pro models gives the phone a real-time depth map of the environment, with centimeter-level understanding of the space around it. That means virtual objects can be placed in ways that respect real-world geometry: a crate can sit on the floor, a wall can align with an actual wall, and obstacles can feel like they belong in the room rather than floating on top of it. For a game where the virtual environment needs to feel like it genuinely fills the space, that difference matters immediately. Without reliable depth information, objects can drift, clip, or hover in ways that break the illusion. The tradeoff is device requirement. LiDAR is only available on iPhone Pro models, which narrows the audience. But for this game, the better AR experience was worth it. The seeker sees a version of the room cluttered with virtual obstacles. The hiders are still physically hiding behind real furniture; the phone does not make them disappear. It simply makes finding them harder. Designing the Core Loop The mechanic is simple on paper, but it took a surprising amount of tu

GitHub热门项目 | FluidVoice - Fastest macOS Offline Dictation app - Voice to Text fully Local. One ⭐ takes us a long way :)) | Stars: 3,289 | 264 stars today | 语言: Swift