在swift中将object数组编码为UserDefaults时出错

import Foundation

// 定义一个自定义对象
class Person: NSObject, NSCoding {
    var name: String
    var age: Int
    
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
    
    // 归档方法
    func encode(with coder: NSCoder) {
        coder.encode(name, forKey: "name")
        coder.encode(age, forKey: "age")
    }
    
    // 解档方法
    required init?(coder: NSCoder) {
        name = coder.decodeObject(forKey: "name") as? String ?? ""
        age = coder.decodeInteger(forKey: "age")
    }
}

// 创建一个object数组
let persons = [Person(name: "John", age: 25), Person(name: "Jane", age: 30)]

// 将object数组转换为NSData
let data = NSKeyedArchiver.archivedData(withRootObject: persons)

// 存储到UserDefaults中
UserDefaults.standard.set(data, forKey: "persons")

// 从UserDefaults中读取数据
if let storedData = UserDefaults.standard.data(forKey: "persons"),
   let storedPersons = NSKeyedUnarchiver.unarchiveObject(with: storedData) as? [Person] {
    // 成功读取数据
    for person in storedPersons {
        print("Name: \(person.name), Age: \(person.age)")
    }
} else {
    // 读取数据失败或数据为空
    print("Failed to retrieve data from UserDefaults.")
}