MessageInputBarDelegate Method Keyboard is Shown #20

Is there a way to detect when the keyboard is shown or better yet when the user taps on the text field? I want to build functionality to where when the user opens the keyboard or taps the text field to start editing, it checks to see if the table view is at the bottom, and if so, it automatically scrolls back down to the bottom.

Currently if you are at the bottom of the table view, and you take the text field, the messages at the bottom disappear until you scroll down again.