Interview guides / ios
PreferenceKey: iOS Interview Question
PreferenceKey interview question with a clear example answer for iOS engineers. Practice with AceMobileInterview.
This is a common iOS interview topic: PreferenceKey.
Below is a concise answer you can adapt in a real interview, then go deeper in the full AceMobileInterview track.
1.What are PreferenceKeys used for?
Child-to-parent communication of layout/geometry data (e.g. measuring views). Useful for sticky headers/custom coordination; overuse can cause extra layout passes.
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