Which UI Design is better for iPhone?

Question

I have a PickerView for choosing time. For example, the user can choose 5 hours and 10 minutes. I should use one picker view to display two row... or I should separate to two picker view, in the middle, I use a label "hour", and "minute". Which UI design is better? and why? thx you.

Answer 1

If I were you I'd use an UIDatePicker, as described by the HIG here. It's the standard way to do this, and would mean users familiar with other applications will instantly be familiar with the control of yours. It contains labels on the spin-wheels so avoids your problem of making it clear to the user what each control represents.