由于NSKeyedArchiver archiveRootObject已弃用，无法使用Firebase编译iOS应用程序

// 自定义对象的归档和解档
class CustomObject: NSObject, NSCoding {
    var name: String
    var age: Int
    
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
    
    // 归档
    func encode(with coder: NSCoder) {
        coder.encode(name, forKey: "name")
        coder.encode(age, forKey: "age")
    }
    
    // 解档
    required init?(coder: NSCoder) {
        name = coder.decodeObject(forKey: "name") as? String ?? ""
        age = coder.decodeInteger(forKey: "age")
    }
}

// 归档对象
let customObject = CustomObject(name: "John", age: 25)
let data = NSKeyedArchiver.archivedData(withRootObject: customObject)

// 解档对象
if let decodedObject = NSKeyedUnarchiver.unarchiveObject(with: data) as? CustomObject {
    print(decodedObject.name) // 输出: John
    print(decodedObject.age) // 输出: 25
}