backgroundViewClass
The class to use for displaying the popover background content.
Declaration
var backgroundViewClass: AnyClass? { get set }Discussion
The default value of this property is nil, which indicates that the popover controller should use the default popover appearance. Setting this property to a value other than nil causes the popover controller to use the specified class to draw the popover’s background content. The class you specify must be a subclass of UIPopoverBackgroundView.