Use the nsuserdefaults method to save historical data

Nsuserdefaults * userdefault = [nsuserdefaults standarduserdefaults];

 

Files are stored in

/User/Mike/library/preferences/
Directory.

1. Integer

1. Store [userdefault setinteger: integer forkey: @ "intkey"];

2. Read nsinteger intvalue = [userdefault objectforkey: @ "intkey"];

2. value or struct

1. Storage

Nsmutablearray * tmparray = [[nsmutablearray alloc] initwitharray: [nsarray arraywithobjects: @ "flasjf", @ "afsadfas", nil];

[Userdefault setobject: tmparray forkey: @ "array"];

2. Read

 

Nsmutablearray * ttarray = [userdefault objectforkey: @ "array"];

For (INT I = 0; I <[ttarray count]; I ++ ){

Nsstring * filename = (nsstring *) [ttarray objectatindex: I];

Nslog (@ "% @", filename );

}

3. For other methods, see the official documentation.