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Pitfalls of PhotoKit

griffin-stewie
December 22, 2015
Programming
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240

Pitfalls of PhotoKit

関西モバイルアプリ研究会 #9 (kanmoba)

griffin-stewie

December 22, 2015
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Transcript

  1. Pitfalls of PhotoKit @griffin_stewie

  2. Fenrir Inc. @griffin_stewie Bouldering: Level 5

  3. PhotoKit

  4. PhotoKit • From iOS 8 • Sophisticated • Thread safe

  5. Simple Fetching

  6. Assets Library • Enumerate groups and assets • Filter inside

    loop • Easy access raw data

  7. PhotoKit • Call fetch methods • Like CoreData • Apply

    fetch options

  8. Complicated Fetching

  9. PHFetchOptions • dates • pixelWidth • pixelHeight • etc

  10. PhotoKit • Access raw data ?

  11. Darkside

  12. Too slow

  13. Fetching 5000 assets • Assets Library • Takes a few

    seconds • PhotoKit • Takes a few minutes

  14. Reasons

  15. XPC • Assets Library • Same process as app •

    PhotoKit • Separate process • Communicate using XPC

  16. Thread safe • Assets Library • Developers should take care

    of it • PhotoKit • Framework cares

  17. Let's use obediently