object-c get,set 要怎么重写

Question

C#代码

public static string adminPaswd
{
get
{
if (stradminPaswd==null)
{
stradminPaswd=SQLite.Instance.adminPswd;//读取数据库
}
return stradminPaswd;
}
set
{
stradminPaswd = value;
SQLite.Instance.adminPswd = stradminPaswd;//写入数据库
}
}
在下初学oc不知道以上功能用object-c 要怎么实现，请高手解答

希望实现效果

读取：string s = adminPaswd;

写入：adminPaswd = "123";

Answer 1

http://blog.csdn.net/lonelyroamer/article/details/7665112