No need to retain the left/rightSideView as they are now top-level objects in the nib and therefore implicitly retained by the nib's owner.
No need to retain the left/rightSideView as they are now top-level objects in the nib and therefore implicitly retained by the nib's owner.

JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim