swift 归档&解档使用方法 【转载XMG】

1.获取沙盒路径

//1.获取沙盒路径
var accountPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
accountPath = (accountPath as NSString).appendingPathComponent("account.plist")

2.归档

NSKeyedArchiver.archiveRootObject(account, toFile: accountPath)

3.解档

account = NSKeyedUnarchiver.unarchiveObject(withFile: accountPath) as? GGAccount

归档对象必须遵守NSCoding协议
例如创建了一个账户类account.swift
1.遵守协议

class GGAccount: NSObject,NSCoding{
    ...
}

2.必须实现2个方法 public func encode(with aCoder: NSCoder)，public init?(coder aDecoder: NSCoder)

class GGAccount: NSObject,NSCoding{
    ...

    // 归档&解档
    // 解档
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObject(forKey: "access_token") as? String
        uid          = aDecoder.decodeObject(forKey: "uid")          as? String
        expires_date = aDecoder.decodeObject(forKey: "expires_date") as? NSDate
        name         = aDecoder.decodeObject(forKey: "name")         as? String
        avatar_large = aDecoder.decodeObject(forKey: "avatar_large") as? String
        
    }
    
    // 归档
    func encode(with aCoder: NSCoder) {
        aCoder.encode(access_token, forKey: "access_token")
        aCoder.encode(uid, forKey: "uid")
        aCoder.encode(expires_date, forKey: "expires_date")
        aCoder.encode(name, forKey: "name")
        aCoder.encode(avatar_large, forKey: "avatar_large")
    }
}