remove annotation from another view

Shades
Topic Author
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9 years 5 months ago #11323 by Shades

remove annotation from another view was created by Shades

Hello,

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 ?

emanuele
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Banned

9 years 5 months ago #11327 by emanuele

Replied by emanuele on topic remove annotation from another view

Hi,

you can delete an annotation from another view with notification following these steps:
- Create a method that delete an annotation:

Code:

- (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:

Code:

[[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):

Code:

[[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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