Data persistence scenarios in IOS

What we call data persistence, is to save the data to the hard disk, so that the application or machine restart can also access the previous saved data, in the development of iOS has many Korean drama persistence scheme, let me introduce our common 5 kinds of solutions

1 plist file (attribute list);

2 Preference (preference setting);

3 Nskeyedarchiver (archive);

4 SQLite 3; (Lightweight database)

5 CoreData

* Sandbox mechanism

This means that the iOS program can only access the program's own directory by default, which is what we call the sandbox;

1 concrete structure of the sandbox

Directory

1 Documents

2 tmp

3Library

3.1 Caches

3.2 Preferences

Although there are so many folders in the sandbox, but each folder is very different, have their own special new, select the time to choose the appropriate directory

Data persistence scenarios in IOS