iphone - Import data files into iOS application -

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i tap on attachment in email , able import dxf file (xyz.dxf) application somehow being copied rar file (xyz.rar) in inbox folder. can 1 explain reason behind this? tried on google couldn't find information. hope has experienced format related problem while importing files, me. in advance pointers.

i editing question providing more information below:

plistsnapshot

drawing interchange file document type:

please refer attached picture indicates item 0 (drawing interchange file) 1 showing problem. if declare "document content type utis\item 0 = public.data" copies file in "document\inbox" folder types changes rar no change in file contents.

if leave public.text type in plist, doesn't import file application @ all. if only leave "com.autodesk.dxf" in "document content type utis" item 0, doesn't import.

typical type: custom type file used testing, working without problem, no extension problem etc.


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