QA reports that the app sometimes freezes… - Concurrency | Daily iOS

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ConcurrencyApple

Diagnosing deadlocks

QA reports that the app sometimes freezes completely with no crash log. If you suspect a deadlock, in what order would you track down the cause?

Your answer

ConcurrencyMultiple choiceBasics
You run this GCD code inside viewDidLoad of a UIKit view controller (main thread). What h…
#deadlock #sync
ConcurrencyMultiple choiceAdvanced
You run this GCD code on the main thread. What's the output? …
#deadlock #sync
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Once you've reproduced a bug, which Xcode debugging features do you actually reach for, b…
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Performance and debuggingMultiple choiceAdvanced
After a certain action the app freezes completely (no input response). Which of these are…
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