How to hide the keyboard that pops up in RubyMotion? -

how 1 hide virtual keyboard pops in text field?

the button hides not seem appear , in case, next screen loads (which not have text field) still have keyboard in loaded position.

thanks!

update:

using following allows keyboard return:

 def textfieldshouldreturn textfield textfield.resignfirstresponder 'yes' end 

however, still remains open upon next screen.

it should true instead of 'yes' , don't forget set textfield delegate

 def textfieldshouldreturn textfield textfield.resignfirstresponder true end