Why do all backgrounds disappear on UITableViewCell select?

Why do all backgrounds disappear on UITableViewCell select?

objective-c cocoa-touch uitableview subclassing

objective-c

How to cast 'Class A' to its subclass 'Class B' - Objective-C

objective-c inheritance casting subclassing

objective-c

How to override a superclass' property with more specific types?

objective-c properties subclassing overriding synthesis

objective-c

UIView subclass with its own XIB [duplicate]

iphone objective-c uiview interface-builder subclassing

objective-c

UIPopoverPresentationController should have a non-nil sourceView or barButtonItem set before the presentation occurs on iOS 9

objective-c exception ios9 subclassing uipresentationcontroller

objective-c

Subclassing NSMutableDictionary

iphone objective-c ios nsmutabledictionary subclassing

objective-c

Overriding a variadic method in objective-c

objective-c subclassing variadic-functions

objective-c