BCOVPUIButtonAccessibilityDelegate Protocol Reference Conforms to NSObject Declared in BCOVPUIButton.h Overview A protocol that allows for users to easily override the defeault values of OOTB control buttons' accessibility labels – accessibilityLabelForButton:isPrimaryState: required method - (NSString *)accessibilityLabelForButton:(BCOVPUIButton *)button isPrimaryState:(BOOL)isPrimaryState