iOS Question Send mail with attachment without open mail page

Hi,
I need send an email with attch from my App IOS.
I read tutorial of the link:
https://www.b4x.com/android/forum/threads/mails-and-sms-messages.46131/

On my menu there is a Button "Send data"
I don't need to open a mail page and I don't need to correct body of mail
I have all data to send email without user have to write anything

I want user push Button "Send Data" and reveive a toast message "Email Sent with attachment"

How can I do it?
TKS
Marco