Migrating, and add data, on file using NSDictionary code issues - objective-c

Question

I am migrating from an old version (v2) to the new version (v3) of my app and by that adding two new fields for each player into the playerdata.plist. The reason why i am putting '99' in the new fields is only for testing as i am testing on a v3 file, with the extra fields, to make it easier.
What i am trying to accomplish is:
a. read the file with the player data
b. add to new fields
c. store the file
The current result is that i am storing the same data for each players after the migration.
Code:
- (void)migratePlayerDataPlist {
//====THIS PIECE OF CODE SHOULD BE REMOVED AFTER CERTAIN TIME AS IT WILL NOT BE NEEDED====//
//====..WHEN ALL OLD USERS HAVE MIGRATED. THIS IS WRITTEN SEPTEMBER 5 2012 VERSION 3.0====//
// This procedure migrates the old playerdatafile to version 3 of the game
//Prepare File Manager
NSString *filePath = [self dataFilePath];
NSFileManager *fileMgr;
fileMgr = [NSFileManager defaultManager];
if ([fileMgr fileExistsAtPath: filePath] == YES) {
dataArray = [[NSMutableArray alloc]init];
NSMutableDictionary *gameFileDict = [NSMutableDictionary dictionaryWithContentsOfFile:filePath];
NSLog(#"gameFileDict: %#", gameFileDict);
myKeyArray = [gameFileDict allKeys];
int nrOfKeys = [myKeyArray count];
NSMutableDictionary *migrationDict = [[NSMutableDictionary alloc]initWithCapacity:200];
NSMutableDictionary *xmigrationDict = [[NSMutableDictionary alloc]initWithCapacity:200];
NSLog(#"nrOfKeys: %i", nrOfKeys);
for (int oo = 0; oo < nrOfKeys; oo++) {
[dataArray removeAllObjects]; // Clean array
theObjects = [gameFileDict valueForKey:[myKeyArray objectAtIndex:oo]];
[dataArray addObject:[theObjects objectAtIndex:0]]; // diffSelection
[dataArray addObject:[theObjects objectAtIndex:1]]; // # of games played
[dataArray addObject:[theObjects objectAtIndex:2]]; // # correct answers
[dataArray addObject:[theObjects objectAtIndex:3]]; // # questions
[dataArray addObject:[NSNumber numberWithInt:99]]; // >>New field<< # of games won
[dataArray addObject:[NSNumber numberWithInt:99]]; // >>New field<< # of games lost
xmigrationDict = [NSMutableDictionary dictionaryWithObjectsAndKeys:dataArray, [myKeyArray objectAtIndex:oo], nil];
[migrationDict addEntriesFromDictionary:xmigrationDict];
}
NSLog(#"xmigrationDict: %#", xmigrationDict);
NSLog(#"migrationDict: %#", migrationDict);
NSLog(#"theObjects: %#", theObjects);
// Delete the old file
[fileMgr removeItemAtPath:filePath error:NULL];
// Resave the file with the new data
[migrationDict writeToFile:filePath atomically: TRUE];
// ...and the migration is done
}
}
Current NSLog-based output:
2012-09-06 20:57:50.332 xxxx_3[1505:fb03] gameFileDict: {
Barnspelare = (
1,
1,
2,
2,
1,
0
);
"Ton\U00e5rsspelare" = (
2,
0,
0,
0,
0,
0
);
Vuxenspelare = (
3,
1,
0,
2,
0,
1
);
}
2012-09-06 20:57:50.334 xxxx_3[1505:fb03] nrOfKeys: 3
2012-09-06 20:57:50.335 xxxx_3[1505:fb03] xmigrationDict: {
"Ton\U00e5rsspelare" = (
2,
0,
0,
0,
99,
99
);
}
2012-09-06 20:57:50.336 xxxx_3[1505:fb03] migrationDict: {
Barnspelare = (
2,
0,
0,
0,
99,
99
);
"Ton\U00e5rsspelare" = (
2,
0,
0,
0,
99,
99
);
Vuxenspelare = (
2,
0,
0,
0,
99,
99
);
}
2012-09-06 20:57:50.336 xxxx_3[1505:fb03] theObjects: (
2,
0,
0,
0,
0,
0
)

Answer 1

I think that there is a simpler approach to this. Here is a way:
(Assuming that you have fetched your data in a dictionary called d and skipping the parts where you read / write the file...)
NSMutableDictionary *md = [d mutableCopy];
for (NSString *key in d)
{
NSMutableArray *values = [[md valueForKey:key] mutableCopy];
[values addObject:[NSNumber numberWithInt:99]]; // 1st new field
[values addObject:[NSNumber numberWithInt:99]]; // 2nd new field
[md setObject:values forKey:key];
}
And now your new dictionary (the md) contains:
{
Barnspelare = (
1,
1,
2,
2,
1,
0,
99,
99
);
"Ton\U00e5rsspelare" = (
2,
0,
0,
0,
0,
0,
99,
99
);
Vuxenspelare = (
3,
1,
0,
2,
0,
1,
99,
99
);
}