ios-Data storage

1. Plsit Property List1>applicable to: only some of the classes that are in the foundation framework, such as Nsstring\nsarray\nsdicionary\nsset\nsnumber\nsdata2>call the WriteToFile of the object .... method to write to the file3>call the object's ... The Withcontentsoffile method allows you to read the contents of an object from a file2. Preference Settings1>Nature or the way the Plist property list is stored2>Access is simple*don't care about folders and filenames3>can only be stored in one file (cannot hold large amounts of data)3. Nscoding1>The ability to plug any object that complies with the Nscoding protocol into a file2>-(void) Encodewithcoder: (Nscoder *) Encoder*called when an object is archived (called before the object is written to the file)//in this way it is clear that://1. Which properties need to be stored//2. How to store these attributes3>-(ID) Initwithcoder: (Nscoder *) Decoder*called when an object is parsed from a file//in this way it is clear that://1. Which attributes need to be parsed (read)//2. How to parse (read) These attributes4>If there are attributes in the parent class that need to be archived or read, you must call Super's Encodewithcoder: and Initwithcoder: Method4. SQLite31>ideal for storing large volumes of data//INSERT into T_person (name, age) VALUES (' Jack ', ten);5. Core Data1> IOS5. 0 appears2> Inefficient (packaged with SQLite3)