Edit pdf hangs

I am using following code to set text fields in pdf. But the app hangs

{
PDFDoc *document = [[PDFDoc alloc] init];
@try {
if ([document open:url :NULL] != 0) {
return NULL;
}
int pageCount = document.pageCount;
for (int i = 0; i < pageCount; i++) {
PDFPage *page = [document page:i];
[page objsStart];
int annotCount = [page annotCount];
for (int j = 0; j < annotCount; j++) {
PDFAnnot *annotation = [page annotAtIndex:j];
NSString *code = [annotation getEditText];
NSString *replacement = [codes objectForKey:code];
if(replacement && ![replacement isEqualToString:@"null"]){
[annotation setEditText:replacement];
}
}
page = nil;
}
} @finally {
if([document canSave]) {
[document save];
}
return url;
}
}

I keep getting this error: THREAD WARNING: took '601.202881' ms. Plugin should use a background thread.

Any idea how to solve this issue?

Hi,

this code seems to work correctly, but you should call it when the pdf is closed.
If you call it when the pdf is opened, "document" var will be destroyed and the reader doesn't have a valid pdf instance anymore.
To avoid it, you can add a parameter to you method to get the current document instance.
Something like this: