Flatten Annotations.

[Thảo Nguyễn]

i used that code to flatten Annotations :

-(void)flattenButtonPressed:(id)_sender {

    if (true) {

        [docToOpen FlattenAnnotations: false];

    }

}

 

It works, and after I pressed Flatten Button, all of my annotations in pdf file can not be edited. I just can add new annotations and edit it.

But It cause an error like this : 

Can anyone tell me a solution??? Please! :(