PDF Save as blank

[shripadkulkarnid]

As i am going to save pdf done all
self.annotationController.finishAnnotation()
self.document.annotations = self.annotationController.annotations
self.document.save()
When i going to save it it save as blank pdf

Your Environment

<!— Include as many relevant details about the environment you experienced the bug in —>

• iOS Version:10.3
• Xcode Version:9.2
• Swift Version: 3