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Mobile & games · #xcode
Learn how to use Xcode Instruments' Time Profiler to locate CPU bottlenecks in Swift apps, with a concrete image‑filter example and practical tips for interpretation and optimization.
Move Xcode build settings out of project.pbxproj and into plain-text .xcconfig files: how precedence works, a worked Debug/Release API URL setup, and the mistakes that bite during migration.
Stop writing repetitive glue code. Learn how Swift Macros in Xcode 15 move code generation to compile-time, providing type-safe expansions and eliminating boilerplate.
Stop fighting .pbxproj merge conflicts. Learn how to use .xcconfig files to manage Xcode build settings in plain text, implement environment-based variables, and resolve setting precedence.
Learn how to turn on Address Sanitizer in an Xcode scheme to detect heap buffer overflows, use‑after‑free, and other memory errors during debugging.
Learn how to balance Xcode's Incremental Compilation for fast development and Whole Module Optimization for production performance to reduce build latency.
Learn how to enable ARC for a single Objective‑C file in a mixed‑mode Xcode project, verify the compiler inserts retain/release calls, and revert the change if needed.
Learn how to create, validate, and troubleshoot app icon assets in Xcode’s Asset Catalog. Follow a clear step‑by‑step guide to ensure your icons appear correctly on all devices.
A decision guide for adopting Swift concurrency: compare async/await with GCD and OperationQueue, explain trade-offs, and show a concrete delegate‑to‑async migration with validation steps.
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