코드스쿼드에서 2019년 6월 10일 스위프트 ARC 에 대해 발표한 자료입니다.

1. ARC

2. . .
Hello, I am Dominic

3. Automatic Reference Counting
:
Reference Counting !
ARC ?

4. MRC ARC

5. ARC
!

6. • ,
.

7. •
.

8. • ,
.

9. • .
• deinit
.

10. var reference1
var reference2
var reference3
strong
strong
strong
“John Appleseed”
Person ?
reference1 = Person(name: "John Appleseed") 1
reference2 = reference1 2
reference3 = reference1 3
reference1 = nil 2
reference2 = nil 1
reference3 = nil 0
123120

11. var reference1
var reference2
var reference3
strong
strong
strong
“John Appleseed”
Person ?
reference1 = Person(name: "John Appleseed") 1
1
1
reference1 = nil 0
reference2 = nil 0
reference3 = nil 0
110
reference2 = Person(name: "john Appleseed")
reference3 = Person(name: "john Appleseed")
10 0

12. var reference1
var reference2
var reference3
strong
strong
“John Appleseed”
Person ?
reference1 = Person(name: "John Appleseed") 1
2
1
1
2
reference3 = nil 2
1
reference2 = reference1
reference1 = nil
reference3 = reference1
reference4 = reference2
var reference4
strong
212

13. ?

14. .

16. ?

17. •

18. ?
• weak

19. • .
.
• .
!

21. •

22. ?
• unowned

23. •
nil
•
->
!

25. ARC !
.
.

26. •
• iOS OS X - OSXDEV
• Objective-C SWIFT -
•
• [Swift] Automatic Reference Counting -
- https://medium.com/@jang.wangsu/ios-swift-rc-arc- -mrc- - -strong-weak-
unowned- - - -988a293c04ac
- https://academy.realm.io/kr/posts/letswift-swift-performance/
- https://twitter.com/twostraws/status/1136130799600668672?s=21
- https://namu.wiki/w/%EA%B8%B0%EC%96%B5%EC%9E%A5%EC%B9%98

27. .