objective c - Overriding layoutSubViews: causes "CGAffineTransformInvert: singular matrix" randomly

Question

I'm overriding layoutSubViews: in a UIScrollView and from time to time I get "CGAffineTransformInvert: singular matrix" for every subview I reposition. The layout looks totally okay however. The app does not crash either.

Does anybody know what causes this?

Answer 1

I once had this error cause by mistake was setting a font with size 0 when using

[UIFont fontWithName:size:] 

for a UILabel.