ios - In Swift, NSDictionary(contentOfFile:) sometimes returns nil -


i'm developing ios keyboard extension, , load data of keyboards plist file. version ios 8.4/xcode 6.4.

but sometimes(not everytime), when in viewdidload of inputviewcontroller, nsdictionary(contentsoffile:) returns nil. appears when switched between keyboard , 1 frequently.

what checked:

  • the file not nil.
  • the file name doesnt change @ all.
  • try again while nil.
  • contentsofurl instead of filepath.
  • there ascii codes in plist file.

what i'm suspecting:

  • file-io problems when process doesnt end properly.
  • swift problems

thanks aderstedt, checked nserror.

let nsdata = nsdata(contentsoffile: file, options: nil, error: &nserror) if nserror != nil {     nslog("load error: \(nserror?.description)") }

load error: optional("error domain=nscocoaerrordomain code=256 \"the operation couldn\u2019t completed. (nscocoaerrordomain error 256.)\" userinfo=0x17066c700 {nsfilepath=/private/var/mobile/containers/bundle/application/"my application", nsunderlyingerror=0x174845df0 \"the operation couldn\u2019t completed. (nsposixerrordomain error 24 - many open files)\"}")

i fixed closing other closing garbage files, , following link helpful.

on ios/iphone: "too many open files": need list open files (like lsof)


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