Q:

How to prioritize one constraint over another when the font gets larger

I have a UILabel with the following constraints:
 - Align Center Y to Superview (priority 750)
 - Top Space to View, greater than equal to 0 (priority 1000)

In normal mode, the UILabel is align center to Y which is ok. But if I go to Accessibility setting and set to large fonts (maximum size) I want my label to use the Top Space with greater than equal value.  
Right now is still using the Align Center to Y in both cases. Is there a way when the font is large to use the other constraint with higher priority ?
PS: below this label there are 2 other labels which get shrunk when font is large, because top view label stays in the middle of screen instead of moving up.

A:

Try this
- Bottom space to view, equal to zero (multiplier 2)
- Top Space to View, greater than equal to 0  

Screenshots

Project - https://github.com/leninsmannath/AutoLayoutBottomFromCenter.git

