在Swift中保存一个包含核心数据的特定对象

import Foundation

class MyObject: NSObject, NSCoding {
    var coreData: String
    
    init(coreData: String) {
        self.coreData = coreData
    }
    
    func encode(with coder: NSCoder) {
        coder.encode(coreData, forKey: "coreData")
    }
    
    required init?(coder: NSCoder) {
        self.coreData = coder.decodeObject(forKey: "coreData") as? String ?? ""
    }
}

// 创建对象
let myObject = MyObject(coreData: "Hello, World!")

// 归档对象
let data = NSKeyedArchiver.archivedData(withRootObject: myObject)

// 存储归档数据到文件
let filePath = NSTemporaryDirectory() + "myObject.dat"
try? data.write(to: URL(fileURLWithPath: filePath))

// 从文件中读取归档数据
let loadedData = try? Data(contentsOf: URL(fileURLWithPath: filePath))

// 解档对象
if let loadedObject = NSKeyedUnarchiver.unarchiveObject(with: loadedData!) as? MyObject {
    print(loadedObject.coreData) // 输出: Hello, World!
}