Set focus to PDFAnnotation programmatically

Hi,


I want to iterate all PDFAnnotation through the "Next" button and change focus to the next PDFAnnotation.

I have a list of all PDFAnnotation, but I can't change it as active / focused.


I can scroll PDFView to the location where the PDFAnnotation is located,

but I can't display the keyboard and set focus inside the text PDFAnnotation.


How can I do it?