Question

how to create a sqlite file when the application starts (didFinishLaunchingWithOptions) the test if it already or not exsist otherwise create the file sqlite

Answer 1

Like this… the sqlPath variable is the path to the pre-made sql database on your ressource

- (void) checkAndCreateSQL
{
    if (![[NSFileManager defaultManager] fileExistsAtPath:[documentPath stringByAppendingString:@"/database.sql"]]) {
        [[NSFileManager defaultManager] createFileAtPath:[documentPath stringByAppendingString:@"/database.sql"] 
                                                contents:[NSData dataWithContentsOfFile:sqlPath]
                                              attributes:nil];
    }
}

EDIT 1:

You can create the database on your mac using this command line :

sqlite3 database.sql < DATABASE_CREATION.txt

in the DATABASE_CREATION.txt something like this :

CREATE TABLE IF NOT EXISTS `group` (
  `id` integer PRIMARY KEY,
  `name` text,
  `position` integer
);

Then put directly the database.sql file into your project resource. (like an image)