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In my application, I am getting some string values from a server, but I'm not ending up with the right string.

بسيط this is the string from server side, but what I am getting is بسÙØ·

I tried to test the response string in an online decoder:

http://www.cafewebmaster.com/online_tools/utf8_encode

It is UTF-8 encoded, but I couldn't decode the string on the iPhone side.

I took a look at these Stack Overflow links as reference

Converting escaped UTF8 characters back to their original form
unicode escapes in objective-c
utf8_decode for objective-c

but none of them helped.

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3 Answers 3

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I don't understand from your question the following points:

  1. Do you have access on the server side (I mean the programming of it)?
  2. How do you send and receive data to the server?

For the first question I will assume that the server is programmed to send you text in UTF-8 encoding.

Now on the iPhone if you are sending to the server using sockets use the following:

NSString *messageToSend = @"The text in the language you like";
const uint8_t *str = (uint8_t *) [messageToSend cStringUsingEncoding:NSUTF8StringEncoding];
[self writeToServer:str];

Where the function writeToServer is your function that will send the data to the server.

If you are willing to put the data in a SQLite3 database use:

sqlite3_bind_text(statement, 2, [@"The text in the language you like" UTF8String], -1, NULL);

If you are receiving the data from the server (again using sockets) do the following:

[rowData appendBytes:(const void *)buf length:len];
NSString *strRowData = [[NSString alloc] initWithData:rowData encoding:NSUTF8StringEncoding];

I hope this covers all the cases you need.

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Without any source it is hard to say anything conclusive, but at some point you are interpreting a UTF-8 encoded string as ISO-8859-1, and (wrongfully) converting it to UTF-8:

Analysis for string 'بسيط':

  • raw length: 8
  • logical length: 4
  • raw bytes: 0xD8 0xA8 0xD8 0xB3 0xD9 0x8A 0xD8 0xB7
  • interpreted as ISO-8859-1 (بسÙØ·): 0xC3 0x98 0xC2 0xA8 0xC3 0x98 0xC2 0xB3 0xC3 0x99 0xC2 0x8A 0xC3 0x98 0xC2 0xB7

So at some point you should probably find some reference to ISO-8859-1 in your code. Find it and remove it.

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SOLVED the issue from this link

Different kind of UTF8 decoding in NSString

NSString *string = @"بسÙØ·";

I tried 

[NSString stringWithUTF8String:(char*)[string cStringUsingEncoding:NSISOLatin1StringEncoding]]

this method

Thank You.

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6 Comments

This doesn't sound like you've actually solved something. I hope you don't get paid for "solutions" like this.
@mvds See i can solve my problem by the above method, i posted this here for helping others finding same solutions , may be it will helpful for others
@mvds whats wrong with this , utf8 encoded string can be decoded by using the above method.And i clearly mentioned that the solution solved my issue , So you tell me what would be the right answer for this question?...i ddnt find any thing helpful in your answer !!!!!!!sorry
I've clearly stated what's wrong with it. The most obvious thing is the magic number 5. Please explain to me what the number 5 is doing there. You have a bug somewhere in your code (reading in UTF8 as if it were ISO-8859-1) and you have not fixed it, but put in the "reverse" bug to work around it.
5 means NSISOLatin1StringEncoding
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