Deinit方法永遠不會被稱為 - Swift游樂場在下一個代碼中，我試圖調用deinit方法釋放對Person Class實例的所有引用，Mark但是deinit從不被調用。為什么？class Person{
let name:String
init(name:String){
self.name = name
println("Person created")
}
deinit {
println("Person \(name) deinit")
}}var Mark:Person? = Person(name:"Mark")Mark = nil // Shouldn't the person deinit method be called here? It doesn't.
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