Hello there…
I want to create an App that creates a PDF-File after collecting some information from the user ( user input ).
The user should be able to save or to share this file.
I searched on google but I couldn’t find anything. It would be great if there would be an “internal” solution in Corona…
Thank you! 
There are no facilities in Corona for doing this. There may be a plugin that has that support, but I’m not sure of any. You would need to search the Marketplace to find one. This can be done using native builds. There is a Lua module that uses some native C library, so this would be a good candidate for a plugin.
There is an existing feature request: http://feedback.coronalabs.com/forums/188732-corona-feature-requests-feedback/suggestions/4375776-add-the-ability-to-generate-pdf-files-from-text-an
That needs voted up. You could potentially reach out to a plugin maker like Scott Harrison to see if it’s something he would want to tackle.
Rob
There are no facilities in Corona for doing this. There may be a plugin that has that support, but I’m not sure of any. You would need to search the Marketplace to find one. This can be done using native builds. There is a Lua module that uses some native C library, so this would be a good candidate for a plugin.
There is an existing feature request: http://feedback.coronalabs.com/forums/188732-corona-feature-requests-feedback/suggestions/4375776-add-the-ability-to-generate-pdf-files-from-text-an
That needs voted up. You could potentially reach out to a plugin maker like Scott Harrison to see if it’s something he would want to tackle.
Rob