NSKeyedArchiver archiveRootObject example ios

archiveRootObject :toFile:

Archives an object graph rooted at a given object by encoding it into a data object then atomically writes the resulting data object to a file at a given path, and returns a Boolean value that indicates whether the operation was successful.

+ (BOOL)archiveRootObject:(id)rootObject toFile:(NSString *)path

Parameters

rootObject

The root of the object graph to archive.

path

The path of the file in which to write the archive.

Return Value of [NSKeyedArchiver archiveRootObject]

YES if the operation was successful, otherwise NO.

Discussion

The format of the archive is NSPropertyListBinaryFormat_v1_0.

Example of [NSKeyedArchiver archiveRootObject]

NSString *localPath = @"Documents/my.archive";
NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:localPath];
[NSKeyedArchiver archiveRootObject:archive toFile:fullPath];

Example of [NSKeyedArchiver archiveRootObject]

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex: 0];
NSString* docFile = [docDir stringByAppendingPathComponent: @"Somefile.plist"];
NSError* error;    

 if([NSKeyedArchiver archiveRootObject:tempData toFile:docFile]) {

    NSDictionary *fileAttributes = [NSDictionary
                                dictionaryWithObject:NSFileProtectionComplete
                                forKey:NSFileProtectionKey];
    if([[NSFileManager defaultManager] setAttributes:fileAttributes     
                            ofItemAtPath:docFile  error: &error]) {
        NSLog(@"Success");
    }
 else {
   NSLog@(%@", error);
  }
}