归档 & 解档

代码实现

遵守协议

class AccessToken: NSObject, NSCoding

实现协议方法

// MARK: - 归档&解档
required init(coder aDecoder: NSCoder) {
    access_token = aDecoder.decodeObjectForKey("access_token") as! String
    expires_in = aDecoder.decodeDoubleForKey("expires_in") as NSTimeInterval
    expiresDate = aDecoder.decodeObjectForKey("expiresDate") as? NSDate
    uid = aDecoder.decodeIntegerForKey("uid") as Int
}

func encodeWithCoder(aCoder: NSCoder) {
    aCoder.encodeObject(access_token, forKey: "access_token")
    aCoder.encodeDouble(expires_in, forKey: "expires_in")
    aCoder.encodeObject(expiresDate, forKey: "expiresDate")
    aCoder.encodeInteger(uid, forKey: "uid")
}

保存和加载账户信息

/// 归档路径
static let archivePath = (NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last as! String).stringByAppendingPathComponent("account.plist")

• 保存账户信息

NSKeyedArchiver.archiveRootObject(account, toFile: UserAccount.archivePath)

• 加载账户信息

///  加载账户信息
///
///  :returns: 如果过期返回 nil
class func loadUserAccount() -> UserAccount? {
    if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(archivePath) as? UserAccount {
        // 判断是否过期
        if account.expiresDate!.compare(NSDate()) == NSComparisonResult.OrderedDescending {
            return account
        }
    }
    return nil
}

测试加载用户账户

• 在 AppDelegate 中增加如下代码

/// 全局用户账户
var sharedUserAccount = UserAccount.loadUserAccount()

由于后续所有网络访问都基于用户账户中的 access_token，因此在 AppDelegate 中定义一个全局变量，从而避免重复加载

修改 BaseTableViewController 中的用户是否登录判断

/// 用户登录标记
var userLogin = sharedUserAccount != nil