尝试将对象数组保存到UserDefaults中

// 假设有一个自定义的Person类，实现了NSCoding协议
class Person: NSObject, NSCoding {
    var name: String
    var age: Int
    
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
    
    // 实现NSCoding协议的方法
    func encode(with coder: NSCoder) {
        coder.encode(name, forKey: "name")
        coder.encode(age, forKey: "age")
    }
    
    required init?(coder: NSCoder) {
        name = coder.decodeObject(forKey: "name") as! String
        age = coder.decodeInteger(forKey: "age")
    }
}

// 创建一个对象数组
let person1 = Person(name: "John", age: 25)
let person2 = Person(name: "Emily", age: 30)
let personArray = [person1, person2]

// 将对象数组转换为NSData
let data = NSKeyedArchiver.archivedData(withRootObject: personArray)

// 保存到UserDefaults中
UserDefaults.standard.set(data, forKey: "personArray")

// 从UserDefaults中读取对象数组
if let savedData = UserDefaults.standard.object(forKey: "personArray") as? Data {
    if let savedArray = NSKeyedUnarchiver.unarchiveObject(with: savedData) as? [Person] {
        // 使用保存的对象数组
        for person in savedArray {
            print("Name: \(person.name), Age: \(person.age)")
        }
    }
}