You are allowing the user to enter some text in your UI, using some component such as a text field or text view that requires the keyboard’s presence. However, when the keyboard pops up on the screen, it obstructs a good half of your UI, rendering it useless. You want to avoid this situation.
Listen to keyboard notifications and move your UI components up/down or completely reshuffle your components, so that with the keyboard obstructing the screen, what is essential to the user is still visible to him. For more information about the actual notifications sent by the keyboard, please refer to the Discussion section of this recipe.
iOS devices do not have a physical keyboard. They have a software keyboard that pops up
whenever the user has to enter some text into something like a text
UITextField, see Recipe 2.19 for more
information) or a text view (
UITextView, see Recipe 2.20 for more
information). On the iPad, the user can even split the keyboard and move
it up and down. These are some of the edge cases that you might want to
take care of when designing your user interface. You can work with the
UI designers in your company (if you have access to such experts) and
let them know about the possibility of the user splitting the keyboard
on the iPad. They will need to know about that before making the art and
creatives. We will discuss that edge case in this recipe.
Let’s have a look at the keyboard ...