When view is used on iPad, the position of input field (UIExpandingTextView) is misaligned after autorotation.
It looks like it can be fixed with code like this
self.textView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
when setting up toolbar.
I didn't look further though to find a way to make input field wider when used on iPad screen.
It can be surely done by detecting device in runtime.