Store data's in Ipad

[rahimhaji]

Dear Friends,

iam creating an IOS app using Air for IOS. i want to store data in txt file and retrieve it. Iam using the following code:

import flash.filesystem.*;
import flash.events.MouseEvent;
var cacheDir: File = null;
var tempDir: File = null;

//Initialize the Objects with proper paths.
var str: String = File.applicationDirectory.nativePath;
cacheDir = new File(str + "//Library/Caches");
tempDir = new File(str + "//tmp");
var fr: FileStream = new FileStream();
fr.open(cacheDir.resolvePath("myCache.txt"), FileMode.WRITE);
fr.writeUTFBytes("works");
fr.close();

btn.addEventListener(MouseEvent.CLICK, btn_click)

function btn_click(event: MouseEvent) {
var fw: FileStream = new FileStream();
fw.open(cacheDir.resolvePath("myCache.txt"), FileMode.READ);
txt.text = fw.readUTFBytes(4);
fw.close();
}

it works fine in my desktop. when i compile and intall in ipad, it is not workign pls help me what should i do to make it work. i want to store data's in Ipad..

Thanks in Advance,

Syed Abdul Rahim

[deesharm]

Hi Syed,

I tried with a sample application for iPad and it successfully writes data on ipad:

I used below lines of actionscript code:

private function writeLogToFile() : void

      {

         logArray.reverse();

         fs = new FileStream();

         if(Capabilities.os.search("Linux") != -1)

         {

            fs.open(File.userDirectory.resolvePath("test.txt"),"append");

         }

         else

         {

            if(!File.documentsDirectory.resolvePath("Logs").exists)

            {

               File.documentsDirectory.resolvePath("Logs").createDirectory();

            }

            fs.open(File.documentsDirectory.resolvePath("Logs/playerinstancemanagement.txt"),"append");

         }

         while(logArray.length > 0)

         {

            fs.writeUTFBytes(logArray.pop() + "\n");

         }

         fs.close();

  if(Capabilities.os.search("iPhone")!=-1){

  fs.open(File.documentsDirectory.resolvePath("Logs/done.txt"),FileMode.APPEND);

  fs.writeUTFBytes("done");

  fs.close();

  }else {

  fs.open(File.getRootDirectories()[0].resolvePath("/sdcard/done.txt"),FileMode.APPEND);

  fs.writeUTFBytes("done");

  fs.close();

  }

}

Thanks,

Adobe AIR Team

[jadams602 · Accepted solution]

Just to further clarify the difference between your original code and the sample above that works, you are trying to write a file using File.applicationDirectory. That is a read-only directory on iOS (and normally other platforms as well, as mentioned in the docs for File: File - Adobe ActionScript® 3 (AS3 ) API Reference  )

You shouldn't ever try to write into File.applicationDirectory you should at least use File.applicationStorageDirectory, and if you need cache content consider using File.cacheDirectory. All those helper static File.

Directory properties do all the work for you to chose the right folder no matter what platform.

If you are curious where those directories resolve on various platforms there is a nice summary here:

Adobe Flash Platform * Working with File objects in AIR

[rahimhaji]

Dear Mr.jadam,

Thanks a lot... It's working fine. Problem solved. Thanks a lot.