xcode - UIViewController leaving Space in bottom -

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i upgrading old project ios4 latest ios8. there 2 or 3 view controllers don't right, navigationbar seem cover portion of view , leaving space in bottom. can't seem figure out no matter changed settings removing/adding topbar/statusbars/bottombars, xib file looks alright, not when run on simulator or device. here screenshot of looks like.

enter image description here

enter image description here

if see right, uiimageview holding backgroundimage... ?!?

i can guess, should change uinavigationbarstyle translucent opaque... bring lower, supposed be.


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