Persistence
Data Protection classes
You have logs where the app, woken by a background push while the screen is locked, fails to open its local database. What is file protection (Data Protection) on iOS?
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App lifecycle and systemShort answerIntro
A user is working in your app, takes a phone call, hangs up, goes out to the home screen,…
#background
App lifecycle and systemShort answerBasics
You get a report that a save to the server never lands when the user taps save and goes s…
#background
App lifecycle and systemShort answerAdvanced
A requirement comes in: "every night while the user sleeps, clear the cache and prefetch …
#background
App lifecycle and systemMultiple choiceAdvanced
Which statements about BGAppRefreshTask are correct? Pick all that apply.
#background