
Still struggling on with trying to import files from outwith my app sandbox, but, in addition;
To try and reduce the unrelated 'clutter' that appears in the 'answer file' dialogue box I am trying to (pre-) filter the contents of said dialogue. Text, Application & Picture-types seem pretty easy but I'd like to filter 'zip' files.
I have read the help docs and looked at / played with the tutorials, so I'm pretty OK with the "of type...' and 'with filter..' requirements of the OSX and WIN platforms. In fact I have little problem (I think) with the Win platform, my problem arises with :
-1- OSX syntax for '.zip' file types - when I 'play' with filter syntax here, I either have all contents or nothing displayed

-2- Android / iOS : is there a way to pass filters into the 'mobile pick...' structure or would I have to try and roll my own / accept that all files will be displayed ?
Thanks in advance.