This plugin adds an event listener to the iOS keyboard letting your app listen for willShow, didShow, willHide, didHide event phases. The events contain information about the keyboard height and the duration of the keyboard animation.
The plugin also have an option to move the entire Corona view up with the keyboard, which is a useful feature for eg. chat boxes where the textfield is placed at the bottom of the screen.
As a bonus feature you can use this plugin to turn off autocorrection and spell checking on text boxes created with Coronas API (this is a missing feature in the native.newTextBox implementation).