Xcode 6 constraints for view in viewController fails

Question

I´m pretty new to Xcode and playing around with some techniques.

For testing, i am writing an app where i have a detailViewController with three views within.

As soon as i assign constraints to one of the views the layout gets really strange. No matter if i center horizontally or set border distance, the view seems somehow to vanish and the components within the view are placed somehow.

Any idea what i´m doing wrong?

Answer 1

Sure, you need to follow these basic rules. Checkout the auto layout guide. Each view from the top of the scene to the bottom should have constraints (also constraints should exist from side-to-side if you want expansion and contraction, or have height/width if those are important to maintain). Most times you will need to have at least four constraints per view. The auto layout errors will not go away until all the views have constraints applied and adhere to the simple rules I mentioned above.