ios - Add "Edit in Excel" or "Edit photo" extension -

i checked latest dropbox , excel ios. in dropbox edit button. on click opens excel's extension can edit file.

after save, changes reflected in dropbox file too.

i want add such button. i'd add such button images open them in available "photo editing" apps.

how check if file (image, xls, doc or other) can opened edit?

code far:

uidocumentpickerviewcontroller *documentpicker = [[uidocumentpickerviewcontroller alloc] initwithurl:url inmode:uidocumentpickermodeexporttoservice]; documentpicker.delegate = self; documentpicker.modalpresentationstyle = uimodalpresentationformsheet; [self presentviewcontroller:documentpicker animated:yes completion:nil]; 

also tried changing mode uidocumentpickermodemovetoservice...

as per apple docs move local document. user selects external destination. document picker moves document; however, can still access document external document, letting user edit document in place.

but tried 4 modes. did not show excel option.

   uidocumentpickermodeimport,    uidocumentpickermodeopen,    uidocumentpickermodeexporttoservice,    uidocumentpickermodemovetoservice  

the way communicate other ios apps "locally" using called urlschemes.

this documentation use urlscheme msoffice apps. https://msdn.microsoft.com/en-us/library/office/dn911482.aspx

answering specific question:

how check if file (image, xls, doc or other) can opened edit?

you can use uiapplication method called canopenurl check if current device responds specific urlscheme , if does, can call app edit file. same can applied other apps want open. need see if app have urlscheme support.

remembering in ios 9 need add urls want call during app life in info.plist. otherwise, canopenurl method returno no.

this code illustrates approach. however, search navigation apps. tapping shared friend location in whatsapp.

https://snipt.net/wallaaa/using-url-schemes/

the result: