I\'ve been trying to implement this toolbar, where only the \'Next\' button is enabled when the top textField is the firstResponder and only the \'Previous\' button is enabl
My suggestion here is "don't reinvent the wheel".
Having Prev and Next button over a keyboard for switching between UITextViews is so common that you can find many good implementations ready to use.
Prev
Next
UITextView
Check out BSKeyboardControl, for instance.