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This article walks through a real iOS crash caused by mutating an NSMutableSet during enumeration, explains how the Objective‑C copy attribute works, compares shallow and deep copies for strings and collections, and shows the underlying runtime implementation with concrete code examples.
This article explores the purpose and implementation of UIKIT_EXTERN and related macros in iOS, explaining how they manage global constants, control symbol visibility across dynamic libraries, and provide practical examples of extern, static, and const usage for compilation optimization and conflict resolution.
This article provides a comprehensive, step‑by‑step exploration of Swift closures on iOS, covering their definition, different forms, practical usage scenarios, the compiler’s SIL generation process, capture list behavior, memory storage details, and best practices for avoiding reference cycles.
This article demystifies Objective‑C blocks by explaining their definition, practical uses, syntax variations, common usage scenarios, underlying data structures and compilation process, copy semantics, variable capture rules, reference‑cycle pitfalls, and provides concise code examples and reference links for iOS developers.
This comprehensive guide explains iOS symbolication, covering what it is, its levels, why it matters, how to parse crash logs, the required crash and dSYM files, and step‑by‑step usage of the symbolicatecrash and atos tools to translate hexadecimal addresses into human‑readable source locations.
This article explains three traditional approaches to on‑device AI for mobile apps, compares their drawbacks, and introduces Sohu News' Hybrid AI Engine that unifies TensorFlow Lite and system‑level AI (HiAI) with concise code examples and future open‑source plans.
This article summarizes eight common issues and their solutions when migrating from RHEL6 to RHEL7, covering service management, rc.local scripts, automatic file cleanup, time synchronization, hostname handling, MySQL deployment, network configuration, and log system upgrades.
This article presents a hands‑on guide to using OpenResty—Lua‑enhanced Nginx—for implementing static and dynamic blacklists, fine‑grained rate limiting, A/B testing via upstream selection, and real‑time service quality monitoring, all with production‑ready code examples.
This article walks through a real‑world production‑environment debugging case, showing how tracing with SkyWalking, deep GC log analysis, mis‑configured c3p0 pools and Finalizer behavior can combine to cause intermittent time‑outs and high latency in a distributed Java service.
