iOS get resource path for writing sqlite3 database

gistfile1.m

    // Get documents directory
    NSString *documentsDirectory = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    
    documentsDirectory = [paths objectAtIndex: 0];
    
    NSString *targetPath = [documentsDirectory stringByAppendingPathComponent:@"todo.db"];
    
    if (![[NSFileManager defaultManager] fileExistsAtPath: targetPath]) {
        NSString *sourcePath = [[NSBundle mainBundle] pathForResource:@"todo" ofType:@"db"];
        
        [[NSFileManager defaultManager] copyItemAtPath:sourcePath toPath:targetPath error:nil];
    }