推送到控制器并设置hidesBottomBarWhenPushed后，UILabel放错位置

Having a bit of an issue with my tab bar app. I want to hide the bottom bar in the next controller I push to. I have set the hidesBottomBarWhenPushed to true in the IB. I have a UILabel pinned to the bottom of the screen in this controller. When I push to it the label is not at the bottom of the screen but above it at the same height the toolbar was. Any ideas what I might be doing wrong here? Any pointers would be great!Having a bit of an issue with my tab bar app. I