How to see downloaded file in iphone

hi,i am use file.documentDirectory path for download xls file.after download, used file opener for display xls.but same time i am try to find xls file on my iphone (file manager app) but not show

my main purpose is i am download xls type file but if xls type supportive app not install on our mobile my file not show .after that i try to find in file managar app here my xls file not see

<preference name="iosPersistentFileLocation" value="Library" />
Inside confing.xml ios



Inside info.plist <dist> tag

and use documentsDirectory path