This guide explains why an iOS app may be rejected for IPv6 incompatibility, how to set up a local IPv6 test environment with two iPhones and a Mac, troubleshoot network bugs, update the Reachability library, and strip unsupported architectures from frameworks to resolve App Store upload errors.
The article introduces JD’s iOS Mocker, a server‑side mock service that decouples client development from backend progress, provides comprehensive mock data for all shopping‑flow interfaces, improves testing efficiency, ensures UI robustness, and outlines its architecture, usage workflow, and future extensions.
This article explains how to measure, analyze, and dramatically improve iOS app launch performance through profiling, removing unused code, compressing assets, and restructuring view controller loading, illustrated with a real‑world WiFi manager case study.
This article explains why iOS crash logs are unreadable without symbolication, introduces three symbolication approaches—Xcode's symbolicatecrash, the atos/atosl tools, and dSYM‑based parsing—details the dSYM file structure, Mach‑O headers, load commands, data segments, and how to extract and demangle symbols for effective crash debugging.
This article explains the concepts of shallow and deep copying in Objective‑C, detailing how pointers, memory regions, and collection types behave under copy and mutableCopy, introducing three copy levels (CL1‑CL3), and highlighting common pitfalls and best practices for safe memory management.
This guide explains how to debug iOS devices without a USB cable by using Xcode 9's Wi‑Fi support and, for remote scenarios, by forwarding the usbmuxd service with socat to enable wireless device connections from any machine.
This article explains how to analyze and improve iOS app performance by understanding time‑complexity impacts, leveraging GCD for asynchronous work, preventing thread explosion, optimizing I/O and memory usage, and using low‑level techniques such as stack tracing, symbolication, and objc_msgSend hooking.
This tutorial explains how to build and integrate OpenSSL 1.1.0e for modern Android, iOS, and Linux environments, providing shell scripts for each platform, detailed configuration steps, and examples of using the resulting static libraries in C, JNI, and Java code.
This article introduces WKWebView, compares it with the legacy UIWebView in terms of performance and memory usage, explains usage patterns, delegate protocols, JavaScript‑Native interaction, common pitfalls such as cookie handling, process crashes, caching, and offers practical solutions and best‑practice recommendations for iOS developers.
At the 3rd China Mobile Internet Testing Development Conference, Baidu MTC demonstrated an industry‑leading iOS remote real‑device debugging solution that bridges the testing gap between iOS and Android, enabling low‑latency screen streaming, touch simulation, and Xcode‑based debugging on real iPhones.
The article compares Apple’s Core ML and Google’s TensorFlow on iOS, explaining their architectures, showing performance measurements, and detailing API usage with code examples, highlighting Core ML’s ease of integration versus TensorFlow’s greater flexibility but higher complexity.
The article explores the evolution and core concepts of responsive architecture for iOS, explains immutability and its model layer, examines Flux as its foundational pattern, and provides practical guidance on integrating responsive design into existing mobile app architectures.
This tutorial introduces Apple’s ARKit platform introduced at WWDC 2017, explains the required hardware and iOS version, walks through creating an Augmented Reality App project in Xcode 9, importing 3D models, configuring plane detection, and rendering a virtual cup on a detected horizontal surface using ARSCNView.
This article explains the GIF image format’s LZW compression, container structure, and data blocks, highlights its limitations and iOS playback issues, details the file’s header, logical screen descriptor, color tables, and extension blocks, and demonstrates how animation timing and transparency are controlled.
The article explains the challenges of mobile network environments in China, introduces connection migration issues, and presents iOS network monitoring solutions using NSURLProtocol, code injection (Hook) with Method Swizzling, NSProxy, and Fishhook, as well as detailed usage of NSURLSessionTaskMetrics for performance analysis.
This article explains why using Swift or mixed Swift/Objective-C for business logic in componentized iOS projects is discouraged due to ABI compatibility issues, dynamic library loading overhead, and development complexity.
This article details the design and implementation of an iOS performance‑monitoring SDK that captures fundamental metrics such as CPU usage, memory consumption, frame rate, cold and hot startup times, and power draw, explains the underlying Mach APIs, provides sample Objective‑C code, and discusses practical considerations for accurate measurement and troubleshooting.
Core ML is Apple’s on‑device machine‑learning framework that integrates deep‑learning, decision‑tree, SVM and linear models into iOS apps, leveraging Accelerate, BNNS and Metal Performance Shaders, and the article demonstrates its use with a ResNet‑50 model, Vision APIs, and complete Objective‑C code.
This article chronicles the development of WCDB, WeChat’s open‑source mobile database, detailing its early challenges, performance bottlenecks, security risks, concurrency improvements, cross‑platform collaboration, and future roadmap for a more reliable and efficient data layer on iOS and Android.
This article comprehensively outlines Swift 4’s new syntax, language enhancements, standard‑library updates, performance improvements, and Xcode 9 build‑system changes, providing code examples and explanations to help iOS developers adopt the latest features in modern app development.
This article chronicles the development of WCDB, Tencent WeChat's open‑source mobile database, detailing its early platform challenges, performance and security improvements, cross‑platform collaboration, and future plans to enhance usability, speed, and reliability.
This article describes how to use root access on an iPhone to locate the lock‑screen notification table view via Cycript, create a THEOS tweak that hooks its insertion method, extract message details, and silently email them, providing a complete iOS jailbreak tutorial.
An in‑depth investigation of a CoreMotion‑related crash in the latest QQ mobile app reveals misaligned address access caused by unsafe multithreaded use of UIAccelerometer and CMMotionManager, and demonstrates how to reproduce, trace, and fix the issue by moving accelerometer operations back to the main thread.
The article shares a developer’s experience at WWDC 2017, highlighting Xcode 9’s new Swift support, Wi‑Fi debugging, iOS 11 requirements, CoreML and ARKit introductions, and practical advice for presenting apps to Apple’s design team.
This article explains how to leverage Apple’s XCUITest framework, private XCUIApplication APIs, and Facebook’s WebDriverAgent to implement a web‑based service that remotely controls non‑jailbroken iOS devices for automated testing without requiring device rooting.
Three Liulishuo iOS engineers attended WWDC 2017 and report on Apple’s new iPad productivity features, App Store redesign, Swift updates, Xcode enhancements, and the introduction of CoreML, ARKit, and HomePod, offering developers valuable insights into the evolving iOS ecosystem.
Hyperloop is Meituan‑Dianping’s integrated release‑scheduling platform for iOS, consolidating component publishing, CI, packaging and resource allocation into a single web‑fronted system that replaces fragmented Jenkins jobs with plugin‑based checks, real‑time status, centralized metrics and automated notifications, streamlining over 300 components across multiple apps.
This tutorial shows iOS developers how to set up Python on macOS, install pip and BeautifulSoup, fetch a web page with urllib2, parse the HTML to locate image tags, extract their URLs, and download the images programmatically for use in an app.
This article presents a comprehensive guide on accelerating iOS project compilation by binary‑izing common libraries, detailing three approaches—separate repository management, podspec macro handling, and prepare_command with Carthage/CocoaPods packager—along with their usage, advantages, drawbacks, and a complete workflow for creating, debugging, and publishing binary frameworks.
This article introduces WCDB, the official WeChat mobile database component, covering its architecture, ORM macros, WINQ integrated query, multithreaded high‑concurrency support, corruption repair, and advanced usage such as as‑redirection, chainable calls, and custom field binding for iOS/Mac development.
The iOS Memory Management Seminar by Meituan provides a comprehensive overview of fundamental concepts, including manual reference counting and automatic reference counting, explains retain cycles and autorelease mechanisms, and delves into advanced memory‑management techniques to help developers write efficient, leak‑free applications.
The article clarifies Apple’s Core Audio terminology—defining a sample as a single channel value, a frame as simultaneous samples, and a packet as one or more contiguous frames—explains why these terms are often confused across audio, networking, and codec contexts, and demonstrates the definitions with an MP3 parsing example.
This article explains how React Native leverages iOS’s JavaScriptCore to enable seamless JavaScript‑to‑Objective‑C communication, covering module registration, callback handling, event listening with NativeAppEventEmitter, building native UI components, the module configuration table, and the detailed call flow between JS and native code.
This article explores how to improve the legacy UIWebView on iOS by using the lightweight KakiWebView component, discussing motivations for WebView adoption, JS‑Native interaction via JSBridge and JavaScriptCore, code organization strategies, and a set of extensible plugins.
This article explores how JavaScript has become integral to client‑side development, introduces the JavaScriptCore framework that enables iOS apps to execute JavaScript, and provides detailed guidance on its architecture, core classes, concurrency model, object bridging, memory management, and error handling.
iOS renders views and animations through a multi‑stage pipeline—layout, backing image creation, preparation, commit, then GPU OpenGL compositing—so excessive layers, overdraw, off‑screen rendering, or image decompression can cause frame drops, while marking views opaque, reducing transparency, and using Instruments’ Core Animation and GPU Driver tools help diagnose and optimize performance.
Learn step-by-step how to integrate custom icon fonts into a React Native app by downloading icons from Alibaba's Iconfont library, creating the assets/fonts directory, configuring iOS and Android projects, and using the fontFamily property to display vector icons across platforms.
This article provides a detailed tutorial on measuring and optimizing iOS app performance, covering startup and load times, memory and CPU usage, smoothness metrics, and practical code snippets using Apple Instruments and other tools to obtain reliable data across devices.
This article analyzes the architectural redesign of BANFF, an internal sales mobile app, detailing the challenges of a flat, tightly‑coupled codebase and describing how modularization, technical abstraction, and page‑level refactoring transform it into a maintainable, extensible platform for diverse business roles.
This article describes how Baidu Map's client testing workflow was optimized by analyzing time‑consuming tasks, introducing device‑management and automation tools for Android and iOS, establishing a keyword‑driven framework, integrating continuous integration pipelines, and leveraging a user‑experience platform to achieve significant reductions in test execution time and higher test coverage.
This tutorial demonstrates how to build a single, reusable SQLite library in Free Pascal using CodeTyphon, covering platform‑specific APIs, export conventions for Android, iOS, PC, and detailed compilation and usage examples across Android, iOS, macOS, Linux, and Windows.
This article explains the complex iOS signing mechanism, covering RSA asymmetric encryption, digital signatures, certificates, provisioning profiles, and the multiple distribution methods that require layered signing to ensure only Apple‑approved apps run on devices.
The article examines how iOS string decoding failures caused by malformed UTF‑8 bytes can be mitigated by parsing data byte‑by‑byte and using a custom CFAllocatorRef that reuses a fixed‑size stack or pre‑allocated buffer, avoiding heap fragmentation and improving performance.
Apple warned iOS developers that using hot‑update solutions like JSPatch and Rollout violates App Store policies, prompting a community stir and leading Bugly to advise switching to a safe SDK while providing detailed integration instructions for both CocoaPods and manual setups.
This guide walks you through iMessage sticker creation, covering Apple’s specifications, size and animation frame limits, format choices between GIF and APNG, compression techniques, and practical tools, all illustrated with real‑world examples and user feedback.
Qunar React Native (QRN) is a customized cross‑platform mobile framework built on React Native that unifies iOS and Android UI, reduces app size, supports hot updates, offline bundles, custom IconFont, and has been deployed at massive scale within Qunar’s travel app.
Picasso is a cross‑platform dynamic layout framework for iOS that implements Meituan‑Dianping’s “crafted layout” philosophy, using anchor‑based expressions and JavaScriptCore to compute layouts off‑main‑thread, offering live‑reload, full test coverage, extensible controls and server‑side tooling to dramatically boost UI development productivity.
This article explains how iOS CoreAnimation works behind UIView animations, detailing the role of CALayer, the actionForLayer:forKey: delegate method, animation overlapping behavior, and the distinction between presentationLayer and modelLayer during screen refreshes.
The 2016 Android & iOS Mobile App Quality Report shows a surge in device numbers, highlights higher crash rates for games versus apps, identifies common exceptions like NullPointerException, outlines manufacturer market shares, OS version distribution, and offers actionable insights for developers to improve stability across platforms.
This article explains the iOS message‑sending and forwarding mechanisms—including dynamic, fast, and normal forwarding—and demonstrates how BlocksKit leverages these mechanisms to implement dynamic delegates using blocks, with detailed code examples and class descriptions.
This article examines the concept, benefits, and practical implementation of A/B testing in iOS development, covering design considerations, code organization patterns such as selector caching, strategy pattern, and protocol dispatchers, as well as related build‑time concerns like static‑library merging and CocoaPods subspecs.
This article examines the factors that slow iOS app launch—especially dynamic library loading and Objective‑C class initialization—and presents practical measurements and optimization techniques to dramatically reduce both cold and hot startup times.
This article traces the four stages of mobile terminal development, compares major smartphone operating platforms, and details Renren's practical experiences in unifying architecture, server design, and cross‑platform mobile development from JavaME browsers to iPhone and Android solutions.
The CAMediaTiming protocol defines a hierarchical time system for CALayer and CAAnimation objects, where each layer owns a nested time space whose beginTime, speed, and timeOffset combine to compute active and basic local times, enabling developers to pause, offset, speed up, repeat, or auto‑reverse animations with precise control.
After Apple’s 2017 ATS enforcement requires all iOS apps to use HTTPS, developers must obtain an SSL certificate—such as a free Let’s Encrypt or Tencent Cloud‑issued GeoTrust certificate—install it on their web server (e.g., Nginx), optionally configure CDN encryption, and verify compliance with Apple’s security checks.
Hertz, Meituan Waimai’s mobile‑app performance monitoring framework, automatically detects development anomalies, generates test reports, and streams production metrics—such as FPS, CPU, memory, UI jank, page‑load time, and network traffic—using platform‑specific instrumentation and configurable modes to pinpoint and resolve performance bottlenecks across the app lifecycle.
This talk explains how Qunar’s engineering team analyzed the performance bottlenecks of React Native’s ListView, compared it with native UITableView and Weex implementations, and proposed JavaScript‑based reuse logic and native bridge solutions to improve scrolling efficiency across iOS and Android.
This article provides a detailed walkthrough of building an iOS live‑streaming application, covering the end‑to‑end workflow from video/audio capture, encoding, and transmission to playback, while explaining key protocols, container formats, GPUImage processing, and code examples for developers.
This article presents a detailed case study of the “Fish Fin” adaptive file‑transfer algorithm developed by Tencent’s Mobile Quality Center to dramatically improve image‑upload speed, success rate, and traffic efficiency on Android and iOS apps across varying mobile network conditions.
This article analyzes the nano_free crash issue that appeared on iOS 10.0‑10.1.1, explores several attempted fixes such as dylib replacement, source compilation, environment variable tweaks, and hook strategies, and finally proposes a guarded zone solution to reduce crash probability.
This article explains Meituan’s hybrid approach for iOS, detailing why hybrid is needed, the design of native‑H5 mixing, communication bridge protocols, dynamic routing, resource preloading techniques, and a comparison with alternatives like React and Weex, providing practical insights for fast mobile app iteration.
This article provides a detailed, step‑by‑step guide for iOS developers on measuring and optimizing app performance across CPU usage, GPU‑related stutter, network conditions, and energy consumption using built‑in Instruments, Activity Monitor, Network Link Conditioner, and Charles.
This article explains why iOS apps must use the In‑App Purchase API, outlines the configuration and purchase flow, details subscription handling, receipt verification, security risks, pricing models, and common pitfalls for both iOS and Android platforms.
This article explains iOS memory performance testing by covering static analysis via Xcode's Analyze feature and dynamic analysis tools such as Leaks, Activity Monitor, Allocations, and Zombies, illustrating how to detect memory leaks, unreasonable memory usage, and EXC_BAD_ACCESS errors with practical examples and step‑by‑step guidance.
This article explains how to assess and improve iOS app performance by using Xcode's Instruments tool to measure resource consumption, startup time, and other metrics, and provides practical steps, UI commands, and configuration tips for accurate time profiling and code‑level optimization.
This article shares Ctrip's experience of adopting React Native for its train ticket business, covering why RN was chosen, its current state, the Ctrip RN framework, practical implementation details, encountered pitfalls, and various optimization techniques to achieve near‑native performance and rapid iteration.
This article explains how iOS App Slicing works, how to use Xcode's Asset Catalog to manage image resources, and how to automate the creation of device‑specific assets and the Assets.car file through a Build‑Phase Run Script, addressing challenges in large‑scale apps.
This article explains how to use Apple's App Slicing feature on iOS by managing image resources with Asset Catalog, automating the process through Xcode build‑phase scripts, generating the Assets.car file with actool, and addressing practical considerations for large, multi‑module applications.
This article provides a comprehensive guide to Baidu's mobile SDKs—including Statistics, Map (location), and Voice—detailing their features, platform-specific integration steps for Android and iOS, and sample code snippets for developers to implement analytics, precise positioning, and speech recognition in their apps.
This article walks through the fundamentals of iOS 10 CallKit, explains its three‑module architecture, details the four main call‑handling flows, shares practical integration tips for QQ VoIP, and addresses common pitfalls like silent‑audio issues and version compatibility.
The article explains ReactiveCocoa’s core concepts—RACSignal, subscribers, cold versus hot signals, and key transformations such as bind, map, flatten and throttle—while showing how RACCommand encapsulates actions and RACChannel enables two‑way binding, together illustrating how to build expressive, maintainable data pipelines in iOS apps.
This article explains how third‑party iOS apps can adopt SiriKit to enable voice‑controlled messaging and calling, using QQ’s implementation as a detailed example, and walks through the required Intents and UI extensions, configuration, and handling logic.
This article enumerates and briefly describes the 18 open‑source iOS libraries and components that were used during the development of the NetEase News iOS application, covering networking, UI, audio, image handling, and utility functions.
This guide explains how to configure a cross‑platform CI pipeline for iOS apps using VSTS/TFS, covering project setup, Git repository linking, agent installation on macOS, build definition creation, variable configuration, and triggering builds to produce signed IPA packages.
This article presents a comprehensive automated testing and proactive monitoring solution for Baidu Nuomi's O2O mobile component framework, detailing component‑level UI element identification, schema‑based entry shortcuts, wireless Android test apps, daily case execution, and a JavaScript‑driven monitoring engine that captures UI, request and exception anomalies across iOS and Android.
This article introduces ATX (AutomatorX) and Facebook's WebDriverAgent, explains how to set up the environment on macOS, write Python scripts to control iOS apps, and generate test reports, providing practical code examples and step‑by‑step guidance for mobile automation.
This article presents a detailed overview of mobile app performance testing, covering the importance of performance metrics for video applications, the prioritized dimensions such as smoothness, crash, memory and power consumption, and practical methods and tools for acquiring Android and iOS system metrics.
The Meituan‑Dianping team selected KIF for iOS UI automation because it leverages private APIs, integrates with XCTest, and matches their Objective‑C expertise, then built a testing bundle, wrote page‑object‑style KIF tests, and integrated them into Jenkins pipelines that handle simulator resets, keystroke delays, and multiple system alerts for reliable continuous integration.
This article outlines comprehensive mobile performance testing practices for Baidu Video, covering background, key performance dimensions such as smoothness, crash, memory, power, CPU, and network, and detailing metric collection methods on Android and iOS using command‑line tools, Xcode Instruments, and third‑party utilities.
This article explains practical methods for measuring iOS app performance—including startup time, page load, memory, CPU and smoothness—by instrumenting code, using Apple Instruments tools, analyzing webview loading, and employing runtime techniques such as dynamic library hooking and script‑driven profiling.
The article examines typical coordinate‑system and accuracy problems encountered when implementing location and map features on iOS and Android, explains why they occur, and shares Ctrip's practical solutions including coordinate conversion, Wi‑Fi handling, and WebView‑based map rendering.
This talk details how Tencent's iOS engineers tackled SQLite performance bottlenecks by redesigning multithreaded concurrency, optimizing Busy Retry handling, leveraging WAL and mmap, and applying low‑level I/O and lock improvements, resulting in dramatic reductions in UI lag and CPU waste for heavy‑use users.
In ReactiveCocoa, using RACObserve inside a flattenMap or applying map to a hot RACSubject can create retain cycles because the generated blocks capture self and the subject retains its subscribers, so employing @weakify/@strongify and ensuring signals send a completed or error event breaks these hidden memory leaks.
This article explains how WeChat's iOS client tackled SQLite performance bottlenecks by introducing multi‑handle threading, enabling WAL mode, redesigning the Busy‑Retry mechanism, and applying I/O enhancements such as preserving WAL size and mmap usage, resulting in over 90% reduction in perceived lag.
This article describes how the Qunar iOS team integrated and extended CocoaPods to streamline dependency management, simplify testing workflows, and resolve team‑wide development issues, thereby improving overall development efficiency and code quality across multiple mobile projects.
This article presents Qunar's card‑based native app engine, detailing its design origins, advantages such as reuse, dynamic page organization, style theming, operational delivery, data‑driven personalization, and performance optimizations, while also outlining the framework's boundaries, implementation process, and future roadmap.
This article walks through the design and implementation of a voice‑controlled music iOS application using Siri SDK, Sketch and Principle for UI prototyping, and Xcode with Objective‑C and SpeechKit for speech recognition, culminating in a functional prototype that searches iTunes and plays song previews.
This article explains how to apply for WeChat Pay, obtain required credentials, and integrate the payment flow—including unified order, signed parameter generation, client SDK invocation, and asynchronous result handling—on both Android and iOS platforms using PHP examples.
This tutorial walks you through creating a Chrome extension that functions as a standalone app, implementing a GitHub repository search, packaging it with CCA, and running it on iOS simulators or devices, complete with manifest setup and code examples.
During a Dev Club session, Tencent engineers shared a comprehensive review of their React Native adoption, covering project history, architecture, version management, performance optimization, crash analysis, and practical tips for mobile developers seeking to balance native quality with cross‑platform efficiency.
The article recounts a nine‑day trip to San Francisco for WWDC 2016, blending travel experiences, visits to Silicon Valley companies, and detailed technical takeaways on Swift 3, iOS 10 extensions, SiriKit, notifications, App Transport Security, Xcode 8, and iMessage apps.
The article outlines essential choices such as protocol and server selection, XMPP improvements, mobile network and power optimizations, client‑side handling, and scalability techniques required to develop a reliable, high‑performance instant messaging feature for Android and iOS apps.
This guide details the required Mac hardware, essential software tools, Xcode and Instruments usage, and step‑by‑step procedures for performing iOS automation testing, including UIAutomation scripting and common terminal commands for developers.
This article explains how to use the CodeTyphon IDE and Free Pascal Compiler to create reusable cross‑platform libraries, covering environment setup, compilation commands for Android, iOS devices and simulators, and a complete Pascal example with JNI bindings.
This article reviews the most common iOS architectural patterns—MVC, MVP, MVVM, and VIPER—explaining their responsibilities, testability, and ease of use, and helps developers decide which pattern best fits their project’s complexity and maintenance needs.
This article explains how to achieve native‑like instant loading of H5 pages in mobile apps by pre‑packaging resources, dynamically downloading resource bundles at runtime, and intercepting requests with NSURLProtocol to serve local files, complete with design flow, code examples, and performance comparison.
This article explains how JSPatch leverages JavaScriptCore to let iOS developers dynamically update UI layouts and fix bugs by writing JavaScript that calls Objective‑C APIs, compares it with other hot‑update solutions, and offers practical usage guidelines.
After years of iOS development, the author switched to Android, highlighting the limitations of iOS web support, the rise of Service Workers and Progressive Web Apps on Android, and how these open‑web technologies offer faster, cross‑platform experiences without App Store constraints.
This article explains how to determine whether a client device supports IPv4‑only, IPv6‑only, or dual‑stack networking on iOS and Android, covering gateway detection, DNS analysis, socket‑connect tests, and practical code samples for reliable IP‑stack identification.
This article shares a detailed iOS interview journey—including Baidu, NetEase, and Alibaba rounds—along with algorithm questions, Objective‑C runtime insights, practical coding challenges, and actionable preparation strategies to help developers land their dream mobile development jobs.
