Converting NSData to NSString in Objective c

Question

I want to convert NSData to NSString  What is the best way to do this    I am using this code but the final string returns null  NSString  str     NSString alloc  initWithData data encoding NSUTF8StringEncoding   NSLog       str     When I see console It will print null

User · Accepted Answer

The docs for NSString says   https   developer apple com documentation foundation nsstring 1416374-initwithdata     Return Value An NSString object   initialized by converting the bytes in   data into Unicode characters using   encoding  The returned object may be   different from the original receiver    Returns nil if the initialization   fails for some reason  for example if   data does not represent valid data for   encoding     You should try other encoding to check if it solves your problem      The following constants are provided by NSString as possible string encodings  enum      NSASCIIStringEncoding   1     NSNEXTSTEPStringEncoding   2     NSJapaneseEUCStringEncoding   3     NSUTF8StringEncoding   4     NSISOLatin1StringEncoding   5     NSSymbolStringEncoding   6     NSNonLossyASCIIStringEncoding   7     NSShiftJISStringEncoding   8     NSISOLatin2StringEncoding   9     NSUnicodeStringEncoding   10     NSWindowsCP1251StringEncoding   11     NSWindowsCP1252StringEncoding   12     NSWindowsCP1253StringEncoding   13     NSWindowsCP1254StringEncoding   14     NSWindowsCP1250StringEncoding   15     NSISO2022JPStringEncoding   21     NSMacOSRomanStringEncoding   30     NSUTF16StringEncoding   NSUnicodeStringEncoding     NSUTF16BigEndianStringEncoding   0x90000100     NSUTF16LittleEndianStringEncoding   0x94000100     NSUTF32StringEncoding   0x8c000100     NSUTF32BigEndianStringEncoding   0x98000100     NSUTF32LittleEndianStringEncoding   0x9c000100     NSProprietaryStringEncoding   65536

User · Answer

Objective C     NSString alloc  initWithData nsdata encoding NSASCIIStringEncoding     Swift   let str   String data  data  encoding   ascii

User · Answer

Objective C includes a built-in way to detect a the encoding of a string embedded in NSData  NSData  data      Assign your NSData object     NSString  string  NSStringEncoding encoding    NSString stringEncodingForData data encodingOptions nil convertedString  amp string usedLossyConversion nil

User · Answer

in objective C    NSData  tmpData  NSString  tmpString    NSString stringWithFormat        tmpData   NSLog tmpString

User · Answer

- NSString initWithData encoding  is your friend but only when you use a proper encoding

User · Answer

Unsure of data s encoding type  No problem  Without need to know potential encoding types  in which wrong encoding types will give you nil null  this should cover all your bases  NSString  dataString    data base64EncodedStringWithOptions NSDataBase64EncodingEndLineWithCarriageReturn    Done     Note  In the event this somehow fails  you can unpack your NSData with NSKeyedUnarchiver   then repack the  id unpacked again via NSKeyedArchiver  and that NSData form should be base64 encodeable  id unpacked    NSKeyedUnarchiver unarchiveObjectWithData data   data    NSKeyedArchiver archivedDataWithRootObject unpacked

User · Answer

Swift   let jsonString   String data  jsonData  encoding   ascii    or  utf8 or whatever encoding appropriate

User · Answer

- NSString initWithData encoding  will return nil if the specified encoding doesn t match the data s encoding   Make sure your data is encoded in UTF-8  or change NSUTF8StringEncoding to whatever encoding that s appropriate for the data

User · Answer

NSString  string    NSString stringWithUTF8String  Data bytes

User · Answer

Use below code   NSString  myString  myString     NSString alloc  initWithData nsdata encoding NSASCIIStringEncoding

[iphone] Converting NSData to NSString in Objective c

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