Edit 2 uitextfield by turn with a select in uipickerview

Question

Hi,

I have 2 uitextfield and 1 uipickerview. uipickerview is able to update data into uitextfield in didSelectRow:(NSInteger)row inComponent:(NSInteger)component. But how to update 2 uitextfield from uipickerview by turn when user touch the uitextview?

Thanks. :)