Unable to write to file with phonegap - iphone

Question

Using the methods found on the phonegap api I'm trying to write to a file. This works in Android, but on an iOS device the writer is returning an error. Whenever I call writeFile() it returns an error, and the param passed into writeFail is -1. I cannot see why -1 is being passed into the error function, or why it's even failing to begin with. Has anyone else used the fileWriter on an iOS device, or can you see what I might be doing wrong?
function writeFile() {
var paths = navigator.fileMgr.getRootPaths();
var writer = new FileWriter(paths[0] + "write.txt");
writer.onwrite = writeSuccess;
writer.onerror = writeFail;
writer.write("some sample text");
// The file is now 'some sample text'
}
function writeSuccess() {
console.log("Write has succeeded");
}
function writeFail(evt) {
console.log(evt);
console.log(evt.target.error.code);
}

Answer 1

I had the same problem but I crawled through the mailing list and finally found the solution:
var writer = new FileWriter("write.txt");
This is it. Simply don't prepend the "Documents"-path. The documentation is wrong on that (still).
And don't forget to not use "readAsDataURL" as it would silently not work (on iOS). Hope I could help you.

Answer 2

If you want to write to a file this is the function(phonegap 2.5)
function fileWrite(filePath, text) {
var onFSWin = function(fileSystem) {
fileSystem.root.getFile(filePath, {create: true, exclusive: false}, onGetFileWin, onFSFail);
}
var onGetFileWin = function(fileEntry) {
fileEntry.createWriter(gotFileWriter, onFSFail);
}
var gotFileWriter = function(writer) {
writer.write(text);
}
var onFSFail = function(error) {
console.log(error.code);
}
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFSWin, onFSFail);
}