# efqrcode | EFPrefix | Knowledge Base | Instagit A better way to operate QRCode in Swift, support iOS, macOS, watchOS, tvOS, and/or visionOS. GitHub Stars: 4.7k Repository: https://github.com/efprefix/efqrcode --- ## Articles ### [How to Generate EFQRCode for tvOS and watchOS: A Complete Implementation Guide](/efprefix/efqrcode/generate-efqrcode-tvos-watchos) Generate EFQRCode for tvOS and watchOS apps. This guide shows how to use the EFQRCode Generator class to create QR codes for Apple TV and Apple Watch directly from Swift. - Tags: how-to-guide - Published: 2026-03-01 ### [How EFQRCode Ensures QR Code Scannability When Adding Icons or Watermarks](/efprefix/efqrcode/efqrcode-scannability-icons-watermarks) Discover how EFQRCode guarantees QR code scannability with icons or watermarks using strict size limits finder pattern isolation and layered SVG architecture Enhance your QR codes without sacrificing functionality - Tags: deep-dive - Published: 2026-03-01 ### [Benefits of Using SVG for QR Code Rendering in EFQRCode](/efprefix/efqrcode/efqrcode-svg-rendering-benefits) Discover the advantages of SVG for QR code rendering in EFQRCode. Achieve resolution independent output smaller file sizes and cross platform fidelity. - Tags: tutorial - Published: 2026-03-01 ### [How the Caching Mechanism in EFQRCode Recognizer Works: A Deep Dive into Lazy-Load Detection](/efprefix/efqrcode/efqrcode-recognizer-caching-mechanism) Discover the lazy-load caching in EFQRCode recognizer. Learn how contentArray stores results and invalidates when CGImage changes for optimal performance. - Tags: deep-dive - Published: 2026-03-01 ### [EFQRCode Style Parameters: Complete Guide to Customizing QR Code Appearance](/efprefix/efqrcode/efqrcode-style-customization-parameters) Master EFQRCode style parameters and customize QR code appearance. Explore common icon/backdrop settings and specialized structs for bubble, 2.5D, line styles, and more. - Tags: deep-dive - Published: 2026-03-01 ### [How EFQRCode Embeds Images Within QR Codes: SVG Composition and Masking Techniques](/efprefix/efqrcode/efqrcode-embed-images-in-qr-code) Discover how EFQRCode embeds images in QR codes using SVG composition and masking techniques. Learn to preserve scannability with transparent pixels for advanced QR code designs. - Tags: deep-dive - Published: 2026-03-01 ### [EFQRCode Generation and Recognition: Main Entry Points Explained](/efprefix/efqrcode/efqrcode-source-code-entry-point) Discover EFQRCode generation and recognition entry points in Source/EFQRCode+Generator.swift and Source/EFQRCode+Recognizer.swift. Access core functionalities easily. - Tags: internals - Published: 2026-03-01 ### [EFQRCode Dependencies: QRCodeSwift, SwiftDraw, and Apple Frameworks Explained](/efprefix/efqrcode/efqrcode-key-dependencies) Explore EFQRCode's core dependencies: QRCodeSwift for QR generation and SwiftDraw for vector graphics. Understand how Apple frameworks like CoreGraphics and UIKit enhance its image rendering and recognition capabilities. - Tags: deep-dive - Published: 2026-03-01 ### [EFQRCode Architecture: A Deep Dive into the Modular Swift QR Code Library](/efprefix/efqrcode/efqrcode-architecture) Explore the EFQRCode architecture: a four-layer modular Swift QR code library for data encoding, styling, SVG, and rasterization. Understand its flexible design for developers. - Tags: architecture - Published: 2026-03-01 ### [How EFQRCode Synchronizes Animated Icons and Watermarks: A Technical Deep Dive](/efprefix/efqrcode/efqrcode-synchronize-animated-icons-watermarks) Discover how EFQRCode synchronizes animated icons and watermarks using LCM and parallel processing. Learn the technical details behind seamless QR code animations. - Tags: deep-dive - Published: 2026-03-01 ### [EFQRCode Supported Animated QR Code Formats: GIF and APNG Generation Guide](/efprefix/efqrcode/efqrcode-animated-qr-code-formats) Learn to generate animated QR codes with EFQRCode in GIF and APNG formats. This guide covers essential methods for creating dynamic visual content. - Tags: how-to-guide - Published: 2026-03-01 ### [How to Generate Animated QR Codes with EFQRCode: A Complete Guide](/efprefix/efqrcode/generate-animated-qr-codes-efqrcode) Learn to generate animated QR codes with EFQRCode. Synchronize animated icons with SVG and encode frames for dynamic GIF, APNG, or video formats. Master QR code animation now. - Tags: how-to-guide - Published: 2026-03-01 ### [How EFQRCode QR Code Recognition Accuracy Works: Core Image's Two-Stage Detection Strategy](/efprefix/efqrcode/efqrcode-recognition-accuracy) Discover how EFQRCode enhances QR code recognition accuracy with its innovative two-stage detection strategy. Learn how it processes images for reliable results. - Tags: internals - Published: 2026-03-01 ### [How to Recognize QR Codes from an Image Using EFQRCode: A Complete Guide](/efprefix/efqrcode/recognize-qr-codes-image-efqrcode) Easily recognize QR codes from images with EFQRCode. This guide shows how to use the built-in recognizer with Core Image for automatic grayscale processing and reliable QR code extraction. - Tags: how-to-guide - Published: 2026-03-01 ### [How EFQRCode Handles Different Error Correction Levels: A Complete Guide](/efprefix/efqrcode/efqrcode-error-correction-levels) Explore how EFQRCode manages QR code error correction levels L M Q and H With EFCorrectionLevel you can balance data capacity and damage recovery for robust QR code generation. - Tags: deep-dive - Published: 2026-03-01 ### [Supported Platforms for EFQRCode: iOS, macOS, tvOS, watchOS, and visionOS](/efprefix/efqrcode/efqrcode-supported-platforms) Discover the extensive EFQRCode supported platforms including iOS macOS tvOS watchOS and visionOS Built with Swift EFQRCode seamlessly integrates with CoreGraphics CoreImage and ImageIO frameworks - Tags: supported-platforms - Published: 2026-03-01 ### [How to Add a Watermark to an EFQRCode: Complete Swift Implementation Guide](/efprefix/efqrcode/add-watermark-efqrcode) Learn how to add a watermark to an EFQRCode using Swift. This guide provides a complete implementation for your QR code generation with the efprefix/efqrcode library. Integrate watermarks seamlessly. - Tags: how-to-guide - Published: 2026-03-01 ### [How to Add an Icon to an EFQRCode: Complete Guide with Swift Examples](/efprefix/efqrcode/add-icon-efqrcode) Learn how to add an icon to an EFQRCode easily with Swift examples. This guide shows you how to configure icon image, size, and mode for custom QR codes. - Tags: how-to-guide - Published: 2026-03-01 ### [How to Customize QR Code Styles in EFQRCode: A Complete Guide to Module Shapes, Colors, and Icons](/efprefix/efqrcode/customize-qr-code-styles-efqrcode) Learn to customize QR code styles with EFQRCode. This guide details how to change module shapes, colors, and add icons for unique QR codes. Explore EFQRCode's style options now. - Tags: how-to-guide - Published: 2026-03-01 ### [EFQRCode QR Code Generation Formats: PNG, SVG, GIF, PDF, Video, and More](/efprefix/efqrcode/efqrcode-qr-code-generation-formats) Explore EFQRCode formats: PNG, SVG, GIF, PDF, MOV, MP4, and more. Generate versatile QR codes for any project with this powerful library. - Tags: api-reference - Published: 2026-03-01 ### [How to Generate a Basic QR Code with EFQRCode: A Complete Swift Guide](/efprefix/efqrcode/how-to-generate-basic-qr-code-efqrcode) Learn to generate a basic QR code with EFQRCode in Swift. This guide explains how to initialize EFQRCode Generator and output QR codes as images or PNG data. - Tags: how-to-guide - Published: 2026-03-01 ### [How to Install the EFQRCode Swift Library: CocoaPods, Carthage, and SPM Guide](/efprefix/efqrcode/how-to-install-efqrcode-swift-library) Install the EFQRCode Swift library with ease using CocoaPods, Carthage, or Swift Package Manager. Generate and recognize QR codes in your app today. - Tags: getting-started - Published: 2026-03-01