ios - Javascript and Cordova/Phonegap FileWriter gives Invalid_Modification_Error on a simple text file write -


i using cordova file , filetransfer plugins. have following permissions set in config.xml

<feature name="file">     <param name="ios-package" value="cdvfile" /> </feature> <feature name="filetransfer">     <param name="ios-package" value="cdvfiletransfer" /> </feature>

i trying write plain text file using following piece of code:

this.writefile = function (filename, content, type, callback) {    window.resolvelocalfilesystemurl(cordova.file.applicationdirectory, function(dir) {         dir.getfile(filename, { create: true }, function(fileentry) {             fileentry.createwriter(function(filewriter) {                 filewriter.onwriteend = function(e) {                     console.log('write success');                     callback(null, e);                 };                 filewriter.onerror = function(e) {                     console.log('write error is');                     console.log(e);                      callback(e);                 };                  var blob = new blob([content], {type: type});                 filewriter.write(blob);             }, callback);         }, callback);     }, callback); };

when execute line below:

this.writefile('stuff.txt', 'eggs , burgers', 'text/plain', callback);

i error while writing file code 9, translates invalid_modification_error. mean? permissions? how can give filesystem permissions app in xcode or cordova?

another issue callback function gets called twice! once success , once error. understand writeend not mean successful operation, how handle situations this?

note issue happens on actual ios device. in ios simulator, runs , writes fine on filesystem. after resolving how write text file, go on , write png/mp3/wav files well.

i appreciate help. thanks.

turns out there nothing wrong code above, except apple forbids writing app bundle after bundle installed. bundle signed , no modifications allowed after that.

to able write data, change

cordova.file.applicationdirectory

to

cordova.file.datadirectory

and add following config.xml according needs:

<preference name="iospersistentfilelocation" value="library" />

your data stored in library/nocloud directory in ios.

further reading on ios filesystem: https://developer.apple.com/library/ios/documentation/filemanagement/conceptual/filesystemprogrammingguide/filesystemoverview/filesystemoverview.html


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