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13 Jul 2017
Microsoft has ended support for Windows Phone 8.1
Questions about iOS development and PDF
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TOPIC: remove annotation from another view

remove annotation from another view 2 years 1 month ago #11323

  • Shades
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I would like to remove annotation from another view.When I use the NSNotificationCenter,the annotation is not removed.This how it should work:

1- I have a pdf where I draw an annotation
2- I submit the annotation and I navigate to the second view
3- I have a button in the second which remove the annotation without having to go to pdf.

Can you help me please ?

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remove annotation from another view 2 years 4 weeks ago #11327

  • emanuele
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you can delete an annotation from another view with notification following these steps:
- Create a method that delete an annotation:
- (void)deleteAnnot:(NSNotification *)notification
    PDFAnnot *annot = (PDFAnnot *)notification.object;
    [annot removeFromPage];
    [m_view vRenderSync:m_annot_pos.pageno]; //or the specific page
    [self refresh];
- Create an observer for example in PDFView class that calls deleteAnnot method:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deleteAnnot:) name:@"delete-annot" object:nil];
- Post the notification from a different view (for example you can call pushViewController to show the view):
[[NSNotificationCenter defaultCenter] postNotificationName:@"delete-annot" object:_annot];

Pay attention to keep the annotation instance (annot) also in the second view and send it as notification param.
In this case is assumed that the pdf is opened.
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