SQLite database not saving on iOS - ios

Question

I am updating an entry in a database, the statement works and the code is updated in the database. Once the app has been closed and reopened though the database has not saved. It seems to create a temporary database and then not actually save to the database that the app is reading from.
Here is my code:
-(void)updateDatabase:(int)Level andPlayer:(int)questionID{
DataClass *obj=[DataClass getInstance];
//NSFileManager *filemgr = [NSFileManager defaultManager];
NSString* Database =[NSString stringWithFormat:#"levelProgress.db"];
NSString* databaseP = [[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:Database];
databasePath = [[NSString alloc]initWithString:databaseP];
const char *dbpath = [databasePath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &questionDB) == SQLITE_OK) {
NSString *querySQL = [NSString stringWithFormat:#"UPDATE levelProgress SET completed_questions=completed_questions+1 WHERE level=%d", obj.levelSelected];
const char *query_stmt = [querySQL UTF8String];
sqlite3_prepare_v2(questionDB, query_stmt, -1, &statement, NULL);
if(sqlite3_step(statement)==SQLITE_DONE){
NSLog(#"update worked");
}else{
NSLog(#"did not work");
}
sqlite3_finalize(statement);
sqlite3_close(questionDB);
}
}
Any help with this would be greatly appreciated.

Answer 1

Copy database file databaseP from application bundle into user folder and then update that. You can't update any file in application bundle (they are always read only).
#define kDatabaseName (#"levelProgress.db")
- (void)checkAndCopyDatabaseIfNeeded
{
if (!self.databasePath)
{
// Database should be present in user sandbox at root.
self.databasePath = [NSString pathWithComponents:[NSArray arrayWithObjects:[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject], kDatabaseName, nil]];
}
// Check if the file already copied/exists.
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL success = [fileManager fileExistsAtPath:self.databasePath];
if(!success)
{
// Copy the file from app bundle to user sandbox (Files in app bundle can not be edited).
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:kDatabaseName];
#if DEBUG
BOOL isCopied =
#endif
[fileManager copyItemAtPath:databasePathFromApp toPath:self.databasePath error:nil];
NSAssert(isCopied, #"Problem copying database file to user document folder");
}
}

Answer 2

When the database is in the bundle it is read only. You will need to have your database in your documents directory when writing to it!
Have a look at the accepted answer here: Use and Access Existing SQLite Database on iOS