How to properly assemble a valid xlsx file from its internal sub-components?

Question

I\'m trying to create an xlsx file programmatically on iOS. Since the internal data of xlsx files is basically stored in separate xml files, I tried to recreate xlsx structu

Answer 1

I was having issues and found that was zipping on the wrong folder level. You need to navigate into folder created when you unziped the xlsx and zip the actual files, not the container folder. Dummy me, shared my story, maybe it can help others save time...