In our app we are calling addContentSubviewToTop: on the same subview multiple times (to move the subview to top). This was causing KVO observations to be added multiple times for the same subview. This guards against this situation to not re-configure and re-observe the subview.
In our app we are calling
addContentSubviewToTop:
on the same subview multiple times (to move the subview to top). This was causing KVO observations to be added multiple times for the same subview. This guards against this situation to not re-configure and re-observe the subview.