PDFAnnotationButtonWidget
A PDFAnnotationButtonWidget object provides user interactivity on a page of a PDF document. There are three types of buttons available: push button, radio button, and checkbox.
Declaration
class PDFAnnotationButtonWidgetOverview
PDFAnnotationButtonWidget inherits general annotation behavior from the PDFAnnotation class. If you use a PDFAnnotationButtonWidget object, your application must handle hit testing, unless you are simply using PDFView to display content. This is because PDFView automatically handles hit testing for you.