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๐Ÿ“– Day 07  :  Property Observer ( ํ”„๋กœํผํ‹ฐ ์˜ต์ €๋ฒ„ )

๐Ÿ“Œ Property Observer : ํŠน์„ฑ ๊ด€์ฐฐ์ž

์ฆ‰, ํ”„๋กœํผํ‹ฐ ๊ฐ’์˜ ๋ณ€ํ™”๋ฅผ ๊ด€์ฐฐํ•œ๋‹ค๋Š” ๊ฒƒ์ด๋‹ค.

 

 

๐Ÿ’ก 2๊ฐ€์ง€ ์˜ต์…˜

  • willSet : ๊ฐ’์ด ์ €์žฅ๋˜๊ธฐ ์ง์ „์— ํ˜ธ์ถœ
  • didSet : ์ƒˆ ๊ฐ’์ด ์ €์žฅ๋œ ์งํ›„์— ํ˜ธ์ถœ