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Memory Management in Swift.pdf

Avatar for André Gimenez Faria André Gimenez Faria
November 09, 2019
Programming
1
40

Memory Management in Swift.pdf

Talk about the basics of memory management in Swift and iOS. Presented at NSBrazil, 2019.

Avatar for André Gimenez Faria

André Gimenez Faria

November 09, 2019
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Transcript

  1. Memory Management in Swift André Gimenez Faria iOS Developer @

    Neon

  2. Por que?

  3. None
  4. None

  5. Como funciona?

  6. ARC

  7. Automatic eference ounting R C

  8. "Hi" 1 myString

  9. "Hi" 2 myString myOtherString

  10. "Hi" 2 myString myOtherString myWeakString weak

  11. "Hi" 1 myString myOtherString myWeakString weak

  12. "Hi" 0 myString myOtherString myWeakString weak

  13. None
  14. None

  15. Isso pode dar ruim?

  16. A B

  17. Classes vs Structs Protocols Closures

  18. Struct Class Value Type Reference Type

  19. None

  20. Erro

  21. 2

  22. 2

  23. Erro

  24. 3

  25. 3

  26. Erro

  27. 5

  28. 5

  29. Livro Página é formado por pertence a um

  30. Book Page

  31. Book [Pages] Book’

  32. None

  33. Book [Pages] Book’

  34. None

  35. Book [Pages] Book

  36. None

  37. Book [Pages] Book

  38. None
  39. None
  40. None

  41. Classes vs Structs Protocols Closures

  42. None
  43. None
  44. None

  45. Struct Enum Class

  46. None

  47. Classes vs Structs Protocols Closures

  48. None
  49. None
  50. None
  51. None
  52. None
  53. None

  54. E como consertar código já existente?

  55. None
  56. None
  57. None
  58. None
  59. None
  60. None
  61. None
  62. None
  63. None
  64. None

  65. TLDR Referências fortes para reter uma variável Structs - value

    type Classes - reference type Retain cycle: duas referências fortes apontando entre si Closures “capturam fortemente” o que utilizam

  66. @Andgfaria Obrigado!