How to Convert NSData to NSString

Question

I know this has been asked quite before, and I already followed couple of approaches, but they don't work.

Following is what I already tried:

NSString *newStr = [NSString stringWithUTF8String:[responseData bytes]];
NSString *newStr = [NSString stringWithFormat:@"%.*s", [responseData length], [responseData bytes]];

None of them works. In 1st case, it fills newStr with null. In 2nd, it fills with junk characters. I know from debugger log (po responseData) that I get valid response which is like bbbbbb 00 bbbbbb. [server sends them as byte array]

What to do?

EDIT: I am receiving this data from http request response - using ASIHTTPRequest library, in case anybody can help on that line.

try this http://stackoverflow.com/questions/2467844/convert-utf-8-encoded-nsdata-to-nsstring — DD_, Jan 22 '13 at 11:13
I already tried the solution which is depicted there, mentioned above too. — Nirav Bhatt, Jan 22 '13 at 11:15
Try the first line with simply `responseData` rather than `[responseData bytes]` — colincameron, Jan 22 '13 at 11:28
My mistake sorry, I forgot that `-stringWithUTF8String:` takes a `const char *` — colincameron, Jan 22 '13 at 11:33
possible duplicate of [How to convert an NSData into an NSString Hex string?](http://stackoverflow.com/questions/7520615/how-to-convert-an-nsdata-into-an-nsstring-hex-string) — Nirav Bhatt, Jan 22 '13 at 11:35

score 13 · Answer 1 · answered Jan 22 '13 at 11:18

13

Try this,

NSData *responseData; [Initialize it]
NSString *receivedDataString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; 
NSLog(@"%@",receivedDataString);

answered Jan 22 '13 at 11:18

vinothp

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score 3 · Answer 2 · answered Jan 22 '13 at 10:59

3

Please try following code

NSString *string = [[[NSString alloc] initWithData: responseData.bytes encoding:NSUTF8StringEncoding] autorelease];

answered Jan 22 '13 at 10:59

Nimit Parekh

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score 3 · Answer 3 · edited Jan 22 '13 at 11:07

3

You can use this code lines

NSString *str=[[NSString alloc] initWithBytes:data1.bytes length:data1.length encoding:NSUTF8StringEncoding];

edited Jan 22 '13 at 11:07

CReaTuS

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answered Jan 22 '13 at 11:00

aknew

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what are your data? I get this string from working project and its work well. May be you data encoding isn't UTF8? – aknew Jan 22 '13 at 11:42

score 3 · Accepted Answer · edited May 23 '17 at 11:58

I am posting this for records sake because I found a duplicate and voting to close this down.

Actually what I am receiving is a stream of bytes represented as hex, and all the answers indicated do not work. Only [NSData description] gave me true data, which is something I can't use because it is intended for debugging.

Finally I tried the solution given here, and I get what I want. Thanks to all for trying to help out.

score 2 · Answer 5 · answered Jan 22 '13 at 12:12

2

NSString  *image1Data = [[NSData dataWithData:myData] encodeBase64ForData];

But for this, you have to use NSData+Base64Additions class.

answered Jan 22 '13 at 12:12

Rahul Gupta

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score 1 · Answer 6 · edited Aug 06 '14 at 12:02

1

Use following way

 NSString *dC_Str = [[NSString alloc] initWithData:decryPtd_data encoding:NSASCIIStringEncoding] ;

edited Aug 06 '14 at 12:02

Divya Bhaloidiya

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answered Jan 16 '14 at 06:27

Nag Raj

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How to Convert NSData to NSString

6 Answers6