When to use the Back button vs. Cancel/Done on iPhone

1. What is the difference between cancel and close button?
2. What is the use of cancel button?
3. What is the difference between close and cancel?
4. Should a modal have a close button?

What is the difference between cancel and close button?

Presenting two distinct buttons: X for closing the view (with the side effect of saving intermediate work) and Cancel for abandoning the process.

What is the use of cancel button?

A cancel button is clicked whenever the user presses the ESC key, regardless of which other control on the form has the focus. Such a button is usually programmed to enable the user to quickly exit an operation without committing to any action.

What is the difference between close and cancel?

What is the difference between Canceling and Closing a Sales Order? On a sales order you have the option to either "cancel" or "close" the order. A sales order can be "cancelled" if it has no completed invoices against it. If the order does have completed invoices against it, the order can be "closed."

Should a modal have a close button?

For modals, a 'close' button should be present in the form of a labeled 'close' button or an 'x'. Note: Don't make the button labels confusing. If the user is trying to cancel and a modal appears with ANOTHER cancel button, confusion occurs.