App crashes when deleting data from SQLite in iPhone5 - iphone

Question

I developed a SQLite database when application "didFinishLoading" database cleared and calls a web service to get data and insert it into the database. It's working fine in all iPhone and iPad devices, but on iPhone5, it crashes when deleting data from the database.
Here, tableNamesArray means tables in SQLite.
if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
for (int i = 0; i < [tableNamesArray count]; i++)
{
NSString *querySQL = [NSString stringWithFormat:#"DELETE FROM %#", [tableNamesArray objectAtIndex:i]];
NSLog(#"querySQL %#", querySQL);
// SELECT QuationID,Quation FROM QuationsTable WHERE GroupID="Group0"
const char *query_stmt = [querySQL UTF8String];
sqlite3_stmt *compiledStatement;
if (sqlite3_prepare_v2(contactDB, query_stmt, -1, &compiledStatement, NULL) == SQLITE_OK)
{
}
if (sqlite3_step(compiledStatement) != SQLITE_DONE )
{
}
else
{
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(contactDB);
}
Please help me.

Answer 1

Use This function to copy your database into cache directory.
-(void)createDBcopy:(NSString*)fileName
{
// Check if the SQL database has already been saved to the users phone, if not then copy it over
BOOL success;
// Create a FileManager object, we will use this to check the status
// of the database and to copy it over if required
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths =NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *DBPath=[documentsDirectory stringByAppendingPathComponent:fileName];
//DBPath = [DBPath stringByAppendingString:#".sqlite"];
// Check if the database has already been created in the users filesystem
success = [fileManager fileExistsAtPath:DBPath];
// If the database already exists then return without doing anything
if(success) return;
// If not then proceed to copy the database from the application to the users filesystem
// Get the path to the database in the application package
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:fileName];
// Copy the database from the package to the users filesystem
[fileManager copyItemAtPath:databasePathFromApp toPath:DBPath error:nil];
[fileManager release];
}
And use it as:
[yourClassObjectWhereTheMethodIsWritten createDBcopy:#"yourDB.sqlite"];
You should use it at didFinishLaunchWithOption in Appdelegate.