interealtime · August 29, 2015 14:04
diff --git a/autolayout_issue b/autolayout_issue
 If you set a constraint in Interface Builder and replace it in code for whatever reason (in my case I needed to change the multiplier to animate an aspect ratio), beware.

 What happens: You replace that constraint, it works fine. Then the view rotates, and the hierarchy is re-computed. That constraint that you deleted and replaced in code? It gets added back. Now you have 2 conflicting constraints. Bad things happen.

 What you should do: Delete that constraint in Interface Builder (or mark it as a placeholder / remove at build time), and create it from code when the view loads.
	If you set a constraint in Interface Builder and replace it in code for whatever reason (in my case I needed to change the multiplier to animate an aspect ratio), beware.

	What happens: You replace that constraint, it works fine. Then the view rotates, and the hierarchy is re-computed. That constraint that you deleted and replaced in code? It gets added back. Now you have 2 conflicting constraints. Bad things happen.

	What you should do: Delete that constraint in Interface Builder (or mark it as a placeholder / remove at build time), and create it from code when the view loads.