使用NSCoding使用更多阵列数据更新iOS存储的数据

class CustomData: NSObject, NSCoding {
    var dataArray: [String]
    
    init(dataArray: [String]) {
        self.dataArray = dataArray
    }
    
    // MARK: - NSCoding Methods
    
    func encode(with coder: NSCoder) {
        coder.encode(dataArray, forKey: "dataArray")
    }
    
    required convenience init?(coder: NSCoder) {
        guard let dataArray = coder.decodeObject(forKey: "dataArray") as? [String] else {
            return nil
        }
        
        self.init(dataArray: dataArray)
    }
}

// 存储数据
let data = CustomData(dataArray: ["data1", "data2", "data3"])
let dataFilePath = NSTemporaryDirectory() + "data.archive"

NSKeyedArchiver.archiveRootObject(data, toFile: dataFilePath)

// 更新数据
if let loadedData = NSKeyedUnarchiver.unarchiveObject(withFile: dataFilePath) as? CustomData {
    var updatedData = loadedData
    updatedData.dataArray.append("data4")
    
    NSKeyedArchiver.archiveRootObject(updatedData, toFile: dataFilePath)
}