Write a file on iOS

Question

How do I write a file on iOS  I m trying to do it with the following code but I m doing something wrong   char  saves    abcd   NSData  data     NSData alloc  initWithBytes saves length 4    NSArray  paths   NSSearchPathForDirectoriesInDomains NSDocumentDirectory  NSUserDomainMask  YES   NSString  documentsDirectory    paths objectAtIndex 0   NSString  appFile    documentsDirectory stringByAppendingPathComponent   MyFile     data writeToFile appFile atomically YES     I have created MyFile txt on resources

User · Accepted Answer

Your code is working at my end  i have just tested it  Where are you checking your changes  Use Documents directory path  To get path -  NSLog       documentsDirectory     and copy path from console and then open finder and press Cmd shift g and paste path here and then open your file

User · Answer

Try making  NSString  appFile    documentsDirectory stringByAppendingPathComponent   MyFile      as  NSString  appFile    documentsDirectory stringByAppendingPathComponent   MyFile txt

User · Answer

May be this is useful to you     Method writes a string to a text file - void  writeToTextFile            get the documents directory          NSArray  paths   NSSearchPathForDirectoriesInDomains              NSDocumentDirectory  NSUserDomainMask  YES           NSString  documentsDirectory    paths objectAtIndex 0              make a file name to write the data to using the documents directory          NSString  fileName    NSString stringWithFormat      textfile txt                                                          documentsDirectory             create content - four lines of text         NSString  content     One nTwo nThree nFour nFive             save content to the documents directory          content writeToFile fileName                           atomically NO                                 encoding NSUTF8StringEncoding                                        error nil          Method retrieves content from documents directory and   displays it in an alert - void  displayContent            get the documents directory          NSArray  paths   NSSearchPathForDirectoriesInDomains                          NSDocumentDirectory  NSUserDomainMask  YES           NSString  documentsDirectory    paths objectAtIndex 0              make a file name to write the data to using the documents directory          NSString  fileName    NSString stringWithFormat      textfile txt                                                          documentsDirectory           NSString  content     NSString alloc  initWithContentsOfFile fileName                                                       usedEncoding nil                                                              error nil             use simple alert from my library  see previous post for details           ASFunctions alert content            content release

User · Answer

Swift  func saveFile         let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true      let documentsDirectory   paths 0  as  String     let fileName      documentsDirectory  textFile txt      let content    Hello World      content writeToFile fileName  atomically  false  encoding  NSUTF8StringEncoding  error  nil     func loadFile         let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true      let documentsDirectory   paths 0  as  String     let fileName      documentsDirectory  textFile txt      let content  String   String contentsOfFile  fileName  encoding  NSUTF8StringEncoding  error  nil       println content      Swift 2  func saveFile         let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true      let documentsDirectory   paths 0      let fileName      documentsDirectory  textFile txt      let content    Hello World      do          try content writeToFile fileName  atomically  false  encoding  NSUTF8StringEncoding       catch                func loadFile  - gt String       let paths   NSSearchPathForDirectoriesInDomains  DocumentDirectory   UserDomainMask  true      let documentsDirectory   paths 0       let fileName      documentsDirectory  textFile txt      let content  String     do         content   try String contentsOfFile  fileName  encoding  NSUTF8StringEncoding       catch            content              return content      Swift 3  func saveFile         let paths   NSSearchPathForDirectoriesInDomains  documentDirectory   userDomainMask  true      let documentsDirectory   paths 0      let fileName      documentsDirectory  textFile txt      let content    Hello World      do          try content write toFile  fileName  atomically  false  encoding  String Encoding utf8       catch                func loadFile  - gt String       let paths   NSSearchPathForDirectoriesInDomains  documentDirectory   userDomainMask  true      let documentsDirectory   paths 0      let fileName      documentsDirectory  textFile txt      let content  String     do          content   try String contentsOfFile  fileName  encoding  String Encoding utf8        catch            content              return content

[ios] Write a file on iOS

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