Q:

iOS Basics Guide Xcode not responding properly

I am following the iOS basics guide from apple. I am currently on this page: https://developer.apple.com/library/ios/referencelibrary/GettingStarted/RoadMapiOS/SecondTutorial.html#//apple_ref/doc/uid/TP40011343-CH8-SW1
and when it asks to add the constraints to the textbox I do, just like it says. I run it, turn sideways, nothing happens. I clear the constraints and try again - nothing happens. I update the frames - still nothing. 
I figured I'd continue on through the tutorial. I get to the next 'checkpoint' and try to run the program with the new table view controller as the default or initial view controller - surprise, nothing changes. I have no idea how one even begins to debug this issue. I've closed out of everything Xcode related, tried again, and nothing changes. 

A:

I scrapped the project and created a new one. It all works fine now. I still have no idea why, though.

