UiPickerView on UiScrollView?

In my app I have a UIPickerView on UIScrollView. When I check the delayContentTouches in IB the UIScrollView scrolls, but UIPickerView do not scrolls smoothly. And If I uncheck it then my UIPickerView scrolls smoothly but U开发者_StackOverflow中文版IScrollView do not. UIScrollView is added as subView to my view. All controls are on the UIScrollView. I am unable to figure it out why its behaving like this. Please guide me. Is I am missing something or doing wrong?

Thanks, Panache.