--- title: Mastering QR Code Generation & Scanning in SwiftUI description: A practical guide to implementing QR code generation and scanning in SwiftUI using Core Image and AVFoundation. Covers the full pipeline: converting strings to... canonical: https://daily.dev/posts/wgq7whkb7 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Mastering QR Code Generation & Scanning in SwiftUI | daily.dev og:description: A practical guide to implementing QR code generation and scanning in SwiftUI using Core Image and AVFoundation. Covers the full pipeline: converting strings to... og:url: https://daily.dev/posts/wgq7whkb7 og:image: https://api.daily.dev/og/posts/Wgq7WhKb7.png og:image:alt: Post cover image og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Mastering QR Code Generation & Scanning in SwiftUI **[iOS Developers](https://daily.dev/sources/ios_dev)** · [@divyesh_vekariya](https://daily.dev/divyesh_vekariya) · 10 upvotes · 0 comments ## Summary A practical guide to implementing QR code generation and scanning in SwiftUI using Core Image and AVFoundation. Covers the full pipeline: converting strings to UTF-8 data, applying CIFilter for QR generation, configuring error correction levels, customizing colors, and proper scaling to avoid interpolation artifacts. For scanning, explains setting up AVCaptureSession with metadata output and exposing results via a Combine PassthroughSubject into an MVVM architecture. Also covers production considerations like stopping the session after detection, running camera setup on background queues, and extending the system with structured JSON payloads for deep linking, authentication, and offline data exchange. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#ios](https://daily.dev/tags/ios), [#swift](https://daily.dev/tags/swift), [#swiftui](https://daily.dev/tags/swiftui) [View this post on daily.dev](https://daily.dev/posts/wgq7whkb7) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/wgq7whkb7","headline":"Mastering QR Code Generation & Scanning in SwiftUI","text":"Shared: Mastering QR Code Generation & Scanning in SwiftUI","url":"https://daily.dev/posts/wgq7whkb7","datePublished":"2026-02-23T13:55:29.355Z","dateModified":"2026-02-23T13:56:13.866Z","author":{"@type":"Person","name":"Divyesh Vekariya","url":"https://daily.dev/divyesh_vekariya","image":"https://media.daily.dev/image/upload/s--RDCl1xsD--/f_auto/v1728905544/avatars/avatar_WXcnVdXbQljWuHJCBcViw","description":"Senior iOS Developer, Tech Content Writer, Learner, Tech enthusiast and SwiftUI Addicted.","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":34390}},"image":"https://media.daily.dev/image/upload/s--ZrL_HSsR--/f_auto/v1722860399/public/Placeholder%2006","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":10},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/TmsL6lhzc"},"isPartOf":{"@type":"WebPage","url":"https://daily.dev/squads/ios_dev","name":"iOS Developers"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"iOS Developers","item":"https://daily.dev/squads/ios_dev"},{"@type":"ListItem","position":3,"name":"Mastering QR Code Generation & Scanning in SwiftUI"}]} ```