iOS 数据持久化

KeyChain.png

1、KeyChain ：Securely store small chunks of data on behalf of the user.
KeyChain Apple Documentation

2、UserDefaults ：An interface to the user’s defaults database, where you store key-value pairs persistently across launches of your app.
UserDefaults Apple Documentation

3、NSKeyedArchiver ： A coder that stores an object's data to an archive referenced by keys.
NSKeyedArchiver Apple Documentation