正确使用UIActionSheet委托的方法？指针映射到相同的内存

class ViewController: UIViewController, UIActionSheetDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let actionSheet = UIActionSheet(title: "Choose an option", delegate: self, cancelButtonTitle: "Cancel", destructiveButtonTitle: nil, otherButtonTitles: "Option 1", "Option 2", "Option 3")
        actionSheet.show(in: view)
    }
    
    func actionSheet(_ actionSheet: UIActionSheet, clickedButtonAt buttonIndex: Int) {
        switch buttonIndex {
        case 0:
            print("Option 1 selected")
        case 1:
            print("Option 2 selected")
        case 2:
            print("Option 3 selected")
        default:
            break
        }
    }
}

class Person {
    var name: String
    
    init(name: String) {
        self.name = name
    }
}

let john = Person(name: "John")
var johnAlias = john

johnAlias.name = "John Smith"

print(john.name) // 输出 "John Smith"