ios - Developing on an iPod iTouch - UIView Issues -

so i've been using site lot of questions. i'm googling problems , debugging worst error code, rather basic i'm not able figure out.

my uiview compared see on itouch has been bit different. i'm not sure if xcode's ib having larger graphics buttons, in general there 20px height difference, point if set button @ bottom of uiview, gets cut off. (i thought supposed 320x460..)

normally shrug off because hasn't been issue till i've started put scrolling place login screen. xcode claims view 320x548, app says 320x480. if resize scroll size 320x480, view shrinks on itouch, leaving large gap.

i have been using uiviews in ib rather viewcontroller because i'm subviewing mixed nav control.

is there i'm doing wrong?

http://oi49.tinypic.com/rrnjit.jpg (when first loading)

http://oi50.tinypic.com/j8matu.jpg (scrolling down 20 px..)

you need make correct use of springs , struts or auto layout. designing app 4 inch screen - in storyboard, there option see how on 3:5 inch screen. press that.

for more info, google auto layout.