Reading & Writing to text file After building for iPhone.

Hallo everybody,

I have encountered a problem when i want to read & write from a text file after i build the project for iOS. Before the build everything works fine. After the build the game is not able to read the text file. In Xcode i get the following error.

Could not find file “/var/mobile/Applications/00D2CD16-80C4-4E49-8632-58F62A3A8B00/BottleRoulette.app/Data/words_english.txt”.

I assume this is a temporary file made for the build. This is the code I am using.

i
mport System.IO;

var sr : StreamReader;
var sw : StreamWriter;
var wordArray : String[];
var currentWord :String;
var maxAmount : int = 30;
var currentAmount : int = 0;
var fileName : String = "words_english.txt";

function Start () {


	print(Application.dataPath);
	 
}

function changeWord () {	
	var randomInt = Random.Range(0,currentAmount);		
	currentWord = wordArray[randomInt];	
	guiText.material.color = Color.red;		
	guiText.text = currentWord;	
}

function LoadFile () {
	try {
		// Create an instance of StreamReader to read from a file.
		sr = new StreamReader(Application.dataPath + "/" + fileName);				
		// Count amount of words in file
		currentAmount = 0;		
		while (sr.ReadLine() != null && currentAmount < maxAmount) {
			currentAmount++;
		}
		Debug.Log("Size is:" + currentAmount.ToString());
		wordArray = new String[currentAmount];
				
		sr = new StreamReader(Application.dataPath + "/" + fileName);
		// Fill array with words from file
		var i : int = 0;
		var line : String = sr.ReadLine();
		while (line != null && i < maxAmount) {	
			wordArray *= line;*
  •  	Debug.Log("Added word: " + line);*
    
  •  	line = sr.ReadLine();			*
    
  •  	i++;*
    
  •  }*
    
  •  sr.Close();*
    
  • }*

  • catch (e) {*

  •  // Let the user know what went wrong.*
    
  •  print("The file could not be read:");*
    
  •  print(e.Message);*
    
  • }*
    }

function AddToFile (word : String) {

  • try {*

  •  // Create an instance of StreamWriter to write text to a file.*
    
  •  sw = new StreamWriter(Application.dataPath + "/" + fileName);	* 
    
  •  // Add some text to the file.* 
    
  •  //sw.Write("The date is: ");*
    
  •  sw.WriteLine(word);	* 
    
  •  sw.Close();*
    
  •  Debug.Log("I can access this");*
    
  • }*

  • catch (e) {*

  •  // Let the user know what went wrong.*
    
  •  print("File coudn't be accessed:");*
    
  •  print(e.Message);*
    
  • }*

  • LoadFile();*
    }
    I also tried to code a hard path & use persistentDataPath with no success. Anyone knows how this is done properly?
    Thanks in advance.

What is your full path to the file you want to modify? I spend several hours to solve this problem, so this is the way I’ve solved it:
The first - use Application.persistentDataPath instead of Application.dataPath. And the second - I was trying to modify Application.persistentDataPath/Resources/file.txt and got the same error, then I put my file to the root folder Application.persistentDataPath/file.txt and write operation succeeded.
Tested on Mac, Windows and iOS.
Hope it helps!

If you call Load before append the file you are looking for has not been created yet.