How to check if a file exists in the Documents directory in Swift

Question

How to check if a file exists in the Documents directory in Swift   I am using    writeFilePath   method to save an image into the Documents directory and I want to load it every time the app is launched  But I have a default image if there is no saved image   But I just cant get my head around how to use the   func fileExistsAtPath       function  Could someone give an example of using the function with a path argument passed into it   I believe I don t need to paste any code in there as this is a generic question  Any help will be much appreciated   Cheers

User · Answer

Swift 4 2  extension URL          func checkFileExist   - gt  Bool           let path   self path         if  FileManager default fileExists atPath  path                   print  FILE AVAILABLE               return true          else                      print  FILE NOT AVAILABLE               return false                      Using  -  if fileUrl checkFileExist                 Do Something

User · Answer

This works fine for me in swift4   func existingFile fileName  String  - gt  Bool        let path   NSSearchPathForDirectoriesInDomains  documentDirectory   userDomainMask  true  0  as String     let url   NSURL fileURLWithPath  path      if let pathComponent   url appendingPathComponent    fileName              let filePath   pathComponent path         let fileManager   FileManager default         if fileManager fileExists atPath  filePath                      return true            else            return false                   else            return false                  You can check with this call      if existingFile fileName   yourfilename      true                   your code if file exists               else                  your code if file does not exist                 I hope it is useful for someone    -

User · Answer

For the benefit of Swift 3 beginners    Swift 3 has done away with most of the NextStep syntax So NSURL  NSFilemanager  NSSearchPathForDirectoriesInDomain are no longer used Instead use URL and FileManager  NSSearchPathForDirectoriesInDomain is not needed Instead use FileManager default urls   Here is a code sample to verify if a file named  database sqlite  exists in application document directory   func findIfSqliteDBExists         let docsDir       URL         FileManager default urls for   documentDirectory  in   userDomainMask  first      let dbPath        URL         docsDir appendingPathComponent  database sqlite       let strDBPath     String      dbPath path     let fileManager   FileManager     FileManager default      if fileManager fileExists atPath strDBPath           print  An sqlite database exists at this path      strDBPath         else          print  SQLite NOT Found at      strDBPath

User · Answer

You must add a     slash before filename  or you get path like      DocumentsFilename jpg

User · Answer

Nowadays  2016  Apple recommends more and more to use the URL related API of NSURL  NSFileManager etc   To get the documents directory in iOS and Swift 2 use  let documentDirectoryURL   try  NSFileManager defaultManager   URLForDirectory  DocumentDirectory                                    inDomain   UserDomainMask                           appropriateForURL  nil                                      create  true    The try  is safe in this case because this standard directory is guaranteed to exist   Then append the appropriate path component for example an sqlite file  let databaseURL   documentDirectoryURL URLByAppendingPathComponent  MyDataBase sqlite     Now check if the file exists with checkResourceIsReachableAndReturnError of NSURL   let fileExists   databaseURL checkResourceIsReachableAndReturnError nil    If you need the error pass the NSError pointer to the parameter    var error   NSError  let fileExists   databaseURL checkResourceIsReachableAndReturnError  amp error  if  fileExists   print error      Swift 3    let documentDirectoryURL   try  FileManager default url for   documentDirectory                                   in   userDomainMask                       appropriateFor  nil                               create  true   let databaseURL   documentDirectoryURL appendingPathComponent  MyDataBase sqlite     checkResourceIsReachable is marked as can throw  do       let fileExists   try databaseURL checkResourceIsReachable          handle the boolean result   catch let error as NSError       print error      To consider only the boolean return value and ignore the error use the nil-coalescing operator  let fileExists    try  databaseURL checkResourceIsReachable       false

User · Answer

Very simple  If your path is a URL instance convert to string by  path  method       let fileManager   FileManager default     var isDir  ObjCBool   false     if fileManager fileExists atPath  yourURLPath path  isDirectory   amp isDir            if isDir boolValue                 it s a Directory path          else                it s a File path

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An alternative recommended Code Pattern in Swift 3 would be    Use URL instead of FileManager Use of exception handling  func verifyIfSqliteDBExists        let docsDir       URL         FileManager default urls for   documentDirectory  in   userDomainMask  first      let dbPath        URL         docsDir appendingPathComponent  database sqlite        do          let sqliteExists   Bool   try dbPath checkResourceIsReachable           print  An sqlite database exists at this path      dbPath path          catch          print  SQLite NOT Found at      strDBPath

User · Answer

Check the below code   Swift 1 2  let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true  0  as String  let getImagePath   paths stringByAppendingPathComponent  SavedFile jpg    let checkValidation   NSFileManager defaultManager    if  checkValidation fileExistsAtPath getImagePath         println  FILE AVAILABLE      else       println  FILE NOT AVAILABLE        Swift 2 0  let paths   NSURL fileURLWithPath  NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true  0   let getImagePath   paths URLByAppendingPathComponent  SavedFile jpg    let checkValidation   NSFileManager defaultManager    if  checkValidation fileExistsAtPath    getImagePath           print  FILE AVAILABLE      else       print  FILE NOT AVAILABLE

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Swift 4 x version      let path   NSSearchPathForDirectoriesInDomains  documentDirectory   userDomainMask  true  0  as String     let url   NSURL fileURLWithPath  path      if let pathComponent   url appendingPathComponent  nameOfFileHere             let filePath   pathComponent path         let fileManager   FileManager default         if fileManager fileExists atPath  filePath                print  FILE AVAILABLE             else               print  FILE NOT AVAILABLE                   else           print  FILE PATH NOT AVAILABLE           Swift 3 x version      let path   NSSearchPathForDirectoriesInDomains  documentDirectory   userDomainMask  true  0  as String     let url   URL fileURLWithPath  path       let filePath   url appendingPathComponent  nameOfFileHere   path     let fileManager   FileManager default     if fileManager fileExists atPath  filePath            print  FILE AVAILABLE         else           print  FILE NOT AVAILABLE           Swift 2 x version  need to use URLByAppendingPathComponent      let path   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true  0  as String     let url   NSURL fileURLWithPath  path      let filePath   url URLByAppendingPathComponent  nameOfFileHere   path      let fileManager   NSFileManager defaultManager       if fileManager fileExistsAtPath filePath            print  FILE AVAILABLE         else           print  FILE NOT AVAILABLE

User · Answer

Swift 4 example   var filePath  String         manager lets you examine contents of a files and folders in your app      let manager   FileManager default        returns an array of urls from our documentDirectory and we take the first     let url   manager urls for   documentDirectory  in   userDomainMask  first       print  this is the url path in the document directory   String describing  url            creates a new path component and creates a new file called  Data  where we store our data array     return url  appendingPathComponent  Data   path      I put the check in my loadData function which I called in viewDidLoad   override func viewDidLoad         super viewDidLoad        loadData       Then I defined loadData below   func loadData         let manager   FileManager default      if manager fileExists atPath  filePath            print  The file exists               Do what you need with the file           ourData   NSKeyedUnarchiver unarchiveObject withFile  filePath  as  Array lt DataObject gt                 else           print  The file DOES NOT exist  Mournful trumpets sound

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works at Swift 5      do           let documentDirectory   try FileManager default url for   documentDirectory  in   userDomainMask  appropriateFor  nil  create  true          let fileUrl   documentDirectory appendingPathComponent  userInfo   appendingPathExtension  sqlite3           if FileManager default fileExists atPath  fileUrl path                print  FILE AVAILABLE             else               print  FILE NOT AVAILABLE                   catch           print error          where  userInfo  - file s name  and  sqlite3  - file s extension

User · Answer

It s pretty user friendly  Just work with NSFileManager s defaultManager singleton and then use the fileExistsAtPath   method  which simply takes a string as an argument  and returns a Bool  allowing it to be placed directly in the if statement   let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true  let documentDirectory   paths 0  as  String let myFilePath   documentDirectory stringByAppendingPathComponent  nameOfMyFile    let manager   NSFileManager defaultManager   if  manager fileExistsAtPath myFilePath            it s here       Note that the downcast to String isn t necessary in Swift 2

[ios] How to check if a file exists in the Documents directory in Swift?

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