I would like to concatenate several PDF files to form one single PDF.
Now I've come so far that I know, PDFKit is the proper way to go (I guess).
But I am not sure, how to accomplish the merging.
Should I have one PDFDocument
and several PDFPage
and then call insertPage
on the PDFDocument
?
Or is there a much simpler way? I dont want to alter the PDFs contetwise, I just want to merge them.
Thanks a lot!
Open Acrobat to combine files: Open the Tools tab and select "Combine files." Add files: Click "Add Files" and select the files you want to include in your PDF. You can merge PDFs or a mix of PDF documents and other files.
iLovePDF iLovePDF is another all-in-one PDF software with the PDF merger capability that you can also use as a PDF reader. It is also available on the web and major mobile and desktop platforms, including Windows, macOS, Android, and iOS.
Select the files you want to merge using the Acrobat PDF combiner tool. Reorder the files if needed. Click Merge files. Download the merged PDF.
Combine PDFs with the gs command Use the -sDEVICE attribute to specify the output device or function. Use the -sOUTPUTFILE to specify the merged PDF file. Use the -dBATCH to specify the PDF files to combine in the order you want them to appear. The command above will output merged_file.
As you indicated, you need one output PDFDocument
object which will contain all pages of all input PDF files. To do so, you'll need to loop through all input files, create PDFDocument
objects for each one and iterate over all pages to add them using insertPage
to the output PDFDocument
object.
Assuming that inputDocuments
is an NSArray
of one ore more PDFDocument
objects, you can use this snippet:
PDFDocument *outputDocument = [[PDFDocument alloc] init];
NSUInteger pageIndex = 0;
for (PDFDocument *inputDocument in inputDocuments) {
for (NSUInteger j = 0; j < [inputDocument pageCount]; j++) {
PDFPage *page = [inputDocument pageAtIndex:j];
[outputDocument insertPage:page atIndex:pageIndex++];
}
}
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