Writing Stable iOS Applications
summary
Breaker is a Swift iOS app with ~35k lines of code that finds 90% of crashes fall into four types: force unwrapped optionals, array index out of bounds, miswired Interface Builder outlets, and UI updates off the main thread. Engineers replace exclamation points with guard/if let/nil coalescing, add safe collection extensions and a safe scroll method, and ship weekly TestFlight builds while logging unexpected states via a Crashlytics/Sentry wrapper instead of crashing for users.
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chapters (11)
- 0:00Introduction
- 2:53Why crashes matter
- 3:54Common crash types
- 7:44Force unwrapping optionals
- 8:28Array index out of bounds
- 9:34Interface Builder outlets
- 11:21UI on background thread
- 13:06Crash detection tools
- 15:17Logging errors instead
- 17:05Summary of fixes
- 17:50Q&A session
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