使用可视化格式语言计算不需要的按钮高度

I have a UIViewController with four UIButtons (2 x 2) on it that I laid out in interface builder that worked perfectly. I'm going to have a free and ad-supported version of my app, so I need to redo that scene to load based on whether the app is a paid or ad-supported version. Based on that, I'm attempting to use Visual Formatting Language to lay out the view. I'm getting incorrect values for my (