Is not the correct approach.
You need to use an intermediate web server so have some backend file (PHP, Ruby, etc.) to which you can send a request from your iOS app and receive in response the new entries from the remote database.
At that point you can save the data in local in a coreData or in another sqlite db in your app, and at the next request you will send the last id downloaded and again you will receive the new entries.
If you are not an expert, for request and response you can use easily the iOS framework
AFNetworking 2.0
If you are not an expert of backend interfaces, you can use service like
parse.com
as database.
Enjoy!