The inputAccessoryView is only shown if no hardware keyboard is
connected. Some hardware keyboards doesn't necessary have all keys,
e.g. the Apple magic keyboard to the iPads which lacks the escape
key and all function keys.
To give the user the possibility to use these buttons, always show
the inputAccessoryView.
The UITextView is becoming focused by default in iOS and brings up the
keyboard for user input. This is not the case in tvOS. UITextView in
tvOS is not becoming focused by default and if manually setting it to
focused it will still not bring up the keyboard screen.
The UITextField is however becoming focused in both iOS and tvOS and
requires basically the same implementation. So the UITextView is
replaced with UITextField to bring up keyboard in both iOS and tvOS.
The UIToolbar class is not supported in tvOS. Instead implement the
toolbar as a UITabBar. The UITabBar is set directly as the
inputAccessoryView to the keyboard view in tvOS while in iOS it's put in
a UIScrollView (as the previous UIToolbar) to be able to scale the
inputAccessoryView better for small screens.
The UITabBar behaves a little bit different on iOS and tvOS where in
tvOS the delegate function
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
is called when navigated to a specific toolbar item, while in iOS called
when clicking on an item. To get the tvOS to trigger action on presses,
add a gesture recognizer to handle touch events.
Since the keyboard view on Apple TV always full screen prompted texts
gets hidden behind the keyboard. Delay the showing of the keyboard to
allow the user to understand what's requested as input.
