Archiving and archiving of data

Archiving and archiving of data

Archive

BOOL success = [Nskeyedarchiver archiverrootobject: Archived object tofile: File path];

Solution file

ID content = [nskeyedunarchiver unarchiveobjectwithfile: File path];

Second Solution archive (multi-object)

Archive

NSString *homepath = Nshomepath ();

NSString *filepath = [HomePath stringbyappendingpathcomponent: Archive file name];

Nsmutabledata *data = [Nsmutabledata data];

Nskeyedarchiver *archive = [[Nskeyedarchiver alloc]initforwritingmutabledata:data];

[Archive encodeint:100 forkey:@ "age"];

[Archive Encodeobject: Object name Forkey: @ "name"];

[Archive finishencode];

[Archive release];

BOOL success = [data Writetofile:filepath atomically:yes];

Solution file

NSString *homepath = Nshomepath ();

NSString *filepath = [HomePath stringbyappendingpathcomponent: Archive file name];

NSData *data = [NSData Datawithcontentsoffile:filepath];

Nskeyedunarchiver *unarchive = [[Nskeyedunarchiver alloc]initforreadingwithdata:data];

int num = [unarchive decodeintforkey:@ "age"];

ID obj = [unarchive decodeobjectforkey:@ "name"];

[Unarchive release];

When customizing the archive, follow the Nsecoding protocol.

The way to implement it when archiving

-(void) Encodewithcoder: (Nscoder *) acoder{}

When you do the file,

-(void) Initwithcoder: (Nscoder *) acoder{

self = [super init];

if (self! = nil) {

}

return self;

}//note the ownership of the property of a Point object

Archiving and archiving of data