如何在Swift 3中使用持久化和检索NSCoding兼容对象到应用程序文档目录？

class CustomObject: NSObject, NSCoding {
    var name: String
    var age: Int

    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }

    required convenience init?(coder aDecoder: NSCoder) {
        guard let name = aDecoder.decodeObject(forKey: "name") as? String,
              let age = aDecoder.decodeObject(forKey: "age") as? Int else {
            return nil
        }

        self.init(name: name, age: age)
    }

    func encode(with aCoder: NSCoder) {
        aCoder.encode(name, forKey: "name")
        aCoder.encode(age, forKey: "age")
    }
}

let customObject = CustomObject(name: "John", age: 25)

if let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
    let archiveURL = documentsDirectory.appendingPathComponent("CustomObjectData")

    do {
        let data = try NSKeyedArchiver.archivedData(withRootObject: customObject, requiringSecureCoding: false)
        try data.write(to: archiveURL)
    } catch {
        print("Failed to save data: \(error)")
    }
}

if let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
    let archiveURL = documentsDirectory.appendingPathComponent("CustomObjectData")

    do {
        let data = try Data(contentsOf: archiveURL)
        if let customObject = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data) as? CustomObject {
            print("Name: \(customObject.name), Age: \(customObject.age)")
        }
    } catch {
        print("Failed to retrieve data: \(error)")
    }
}