Why isnt my data persisting with nskeyedarchiver?
- by aking63
Im just working on what should be the "finishing touches" of my first iPhone game. For some reason, when I save with NSKeyedArchiver/Unarchiver, the data seems to load once and then gets lost or something. Here's what I've been able to deduce:
When I save in this viewController, pop to the previous one, and then push back into this one, the data is saved and prints as I want it to.
But when I save in this viewController, then push a new one and pop back into this one, the data is lost.
Any idea why this might be happening? Do I have this set up all wrong? I copied it from a book months ago. Here's the methods I use to save and load.
- (void) saveGameData {
NSLog(@"LS:saveGameData");
// SAVE DATA IMMEDIATELY
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *gameStatePath = [documentsDirectory stringByAppendingPathComponent:@"gameState.dat"];
NSMutableData *gameSave= [NSMutableData data];
NSKeyedArchiver *encoder = [[NSKeyedArchiver alloc] initForWritingWithMutableData:gameSave];
[encoder encodeObject:categoryLockStateArray forKey:kCategoryLockStateArray];
[encoder encodeObject:self.levelsPlist forKey:@"levelsPlist"];
[encoder finishEncoding];
[gameSave writeToFile:gameStatePath atomically:YES];
NSLog(@"encoded catLockState:%@",categoryLockStateArray);
}
- (void) loadGameData {
NSLog(@"loadGameData");
// If there is a saved file, perform the load
NSMutableData *gameData = [NSData dataWithContentsOfFile:[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"gameState.dat"]];
// LOAD GAME DATA
if (gameData) {
NSLog(@"-Loaded Game Data-");
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:gameData];
self.levelsPlist = [unarchiver decodeObjectForKey:@"levelsPlist"];
categoryLockStateArray = [unarchiver decodeObjectForKey:kCategoryLockStateArray];
NSLog(@"decoded catLockState:%@",categoryLockStateArray);
}
// CREATE GAME DATA
else {
NSLog(@"-Created Game Data-");
self.levelsPlist = [[NSMutableDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:kLevelsPlist ofType:@"plist"]];
}
if (!categoryLockStateArray) {
NSLog(@"-Created categoryLockStateArray-");
categoryLockStateArray = [[NSMutableArray alloc] initWithCapacity:[[self.levelsPlist allKeys] count]];
for (int i=0; i<[[self.levelsPlist allKeys] count]; i++) {
[categoryLockStateArray insertObject:[NSNumber numberWithBool:FALSE] atIndex:i];
}
}
// set the properties of the categories
self.categoryNames = [self.levelsPlist allKeys];
NUM_CATEGORIES = [self.categoryNames count];
thisCatCopy = [[NSMutableDictionary alloc] initWithDictionary:[[levelsPlist objectForKey:[self.categoryNames objectAtIndex:pageControl.currentPage]] mutableCopy]];
NUM_FINISHED = [[thisCatCopy objectForKey:kNumLevelsBeatenInCategory] intValue];
}
