// Master debugging techniques and testing strategies for Swift and SwiftUI development. Learn to use Xcode's debugging tools, write effective tests, track crashes, and troubleshoot common issues.
Xcode 26.3 ships with a built-in MCP server that exposes project structure, build actions, and test results to external AI tools. Here's how to set it up.
When Xcode says it can't find a module you've clearly installed, the problem is usually in your build configuration, not your package manager.
Learn how to use Xcode's Device Conditions feature to simulate thermal state and network conditions to test your app under real-world stress scenarios.
When the iOS Simulator refuses to launch, gets stuck booting, or shows a black screen, here's how to diagnose and fix it.
When Xcode's indexing gets stuck or takes forever, your autocomplete and jump-to-definition stop working. Here's how to get it unstuck.
When SwiftUI previews fail with cryptic errors or just spin forever, here's how to diagnose and fix the most common causes.
When building UIs that stream AI-generated content using Apple's Foundation Models framework, testing intermediate states in Xcode Previews requires some creative workarounds. Here's how to preview partially generated content without calling the actual model.
Learn how to symbolicate crash logs from App Store Connect and Xcode Cloud to debug production crashes effectively.
Learn how to search SF Symbols in Xcode.
Learn how to dump all SwiftUI environment values for debugging purposes.
Learn how to fix the Firebase Crashlytics dSYM files not properly being uploaded to Firebase after upgrading to Xcode 15/16.
Learn how to detect if a SwiftUI app is running in a Xcode Preview.
How to resolve the pod install error caused by Xcode 16's new folder-based group structure.
Swizzling is powerful but dangerous. Here are the common pitfalls and how to avoid turning your clever hack into a debugging nightmare.