Detected a case where constraints ambiguously suggest a height of zero

Question

After updating to Xcode 6.1 beta 2 when I run my app that contains tableview cells, the debug assistant says:

Warning once only: Detected a case where constr         


        

Answer 1

In my case, I was building the cell programmatically and kept getting this error.

I was adding the subviews and constraints in the UITableViewCell's init method like this:

addSubview(rankingLabel)
addConstraints(cellConstraints)

I solved the issue by adding them to the cell's contentView instead:

contentView.addSubview(rankingLabel)
contentView.addConstraints(cellConstraints)