swift - When should I use deinit? -


i came across function called deinit() while reading programming guide, i'm still wondering why , when need implement since don't need manage memory.

regards.

it's not required implement method, can use if need action or cleanup before deallocating object.

the apple docs include example:

struct bank {     static var coinsinbank = 10_000     static func vendcoins(var numberofcoinstovend: int) -> int {         numberofcoinstovend = min(numberofcoinstovend, coinsinbank)         coinsinbank -= numberofcoinstovend         return numberofcoinstovend     }     static func receivecoins(coins: int) {         coinsinbank += coins     } }  class player {     var coinsinpurse: int     init(coins: int) {         coinsinpurse = bank.vendcoins(coins)     }     func wincoins(coins: int) {         coinsinpurse += bank.vendcoins(coins)     }     deinit {         bank.receivecoins(coinsinpurse)     } }

so whenever player removed game, coins returned bank.


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