ios - Determine filetype of path string in Swift -

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i need decide filetype of file filename in string. decided last 3 characters of string decide filetype is. how last 3 characters in string. example

var filename = "test.pdf"

i need pdf alone. is there other better way check file type other this. please suggest me also. because think, won able recognise if filetype comes in 4 characters "jpeg" , other stuff. in advance.

i think looking :

the path extension, if any, of string interpreted path. (read-only) declaration

swift

var pathextension: string { }

discussion

the path extension portion of last path component follows final period, if there one. extension divider not included. following table illustrates effect of pathextension on variety of different paths:

receiver’s string value

string returned

“/tmp/scratch.tiff” “tiff”

example : 

file.pathextension

https://developer.apple.com/library/mac/documentation/cocoa/reference/foundation/classes/nsstring_class/index.html#//apple_ref/occ/instm/nsstring/pathextension


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