I added a bannerView to a custom UI detailController view, wired it up to a 
property in the class's .h file then added 

self.canDisplayBannerAds = YES;j 

to my implementation file. The banner works fine, but I'm getting several 
instances of 

<Error>: CGAffineTransformInvert: singular matrix

in console every time I segue into the view. The app isn't crashing or 
producing any other kinds of error output, but I'm wondering whether I'm just 
storing up trouble for later in the day.

The discussion here 

http://stackoverflow.com/questions/7471027/overriding-layoutsubviews-causes-cgaffinetransforminvert-singular-matrix-ran

offered some good theoretical perspective, but if its correct, I'm not sure 
what I need to adjust. I suspect its something to do with the iAd banner 
wanting to redraw the content view, but as I say, the banner displays and works 
fine. The parent view is mostly empty at the moment, but I will be adding 
controls to it next.

Another bunch of search results claim that this error message is/was a bug or 
(at least) an "oddness" associated with Storyboards. One remedy suggested 
switching off AutoLayout (see 
http://www.raywenderlich.com/forums/viewtopic.php?f=20&t=2793&start=120#p32794).
 However, I'm using Xcode 6 beta 3 and the new Size Classes option, which 
doesn't allow for AutoLayout being switched off.

So, my apps not crashing, the banner ad is displaying, can I ignore it this 
message? Or am I going to be tearing my hair out over it further down the line?

Thanks for your thoughts.


Phil




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