How do I convert an NSString value to NSData

Question

User · Answer

Do   NSData  data    yourString dataUsingEncoding NSUTF8StringEncoding     then feel free to proceed with NSJSONSerialization JSONObjectWithData     Correction to the answer regarding the NULL terminator  Following the comments  official documentation  and verifications  this answer was updated regarding the removal of an alleged NULL terminator    As documented by dataUsingEncoding       Return Value      The result of invoking dataUsingEncoding allowLossyConversion  with NO as the second argument  As documented by getCString maxLength encoding  and cStringUsingEncoding       note that the data returned by dataUsingEncoding allowLossyConversion  is not a strict C-string since it does not have a NULL terminator

User · Answer

Objective-C  NSString  str     Hello World   NSData  data    str dataUsingEncoding NSUTF8StringEncoding allowLossyConversion NO     Swift  let str    Hello World  let data   string data using  String Encoding utf8  allowLossyConversion  false

User · Answer

Objective-C   NSString  str     test string   NSData  data    NSKeyedArchiver archivedDataWithRootObject str   NSString  thatStr    NSKeyedUnarchiver unarchiveObjectWithData data     Swift   let str    test string  let data   NSKeyedArchiver archivedData withRootObject  str  let thatStr   NSKeyedUnarchiver unarchiveObject with  data  as  String

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Objective-C   NSString to NSData   NSString  str    string   NSData  data  str dataUsingEncoding NSUTF8StringEncoding     NSData to NSString   NSString  newStr     NSString alloc  initWithData theData encoding NSUTF8StringEncoding     Swift   String to Data   var testString    string  var somedata   testString data using  String Encoding utf8    Data to String   var backToString   String data  somedata   encoding  String Encoding utf8  as String

User · Answer

In case of Swift Developer coming here   to convert from NSString   String to NSData  var  nsdata    nsstring dataUsingEncoding NSUTF8StringEncoding

User · Answer

NSString  str     hello   NSData  data    NSData dataWithBytes str UTF8String length str length

User · Answer

NSString  str     helowrld      This converts the string to an NSData object NSData  data    str dataUsingEncoding NSUTF8StringEncoding     you can take reference from this link

User · Answer

NSString  str     Banana   NSData  data    str dataUsingEncoding NSUTF8StringEncoding allowLossyConversion true

User · Answer

NSString  str     teststring   NSData  data    str dataUsingEncoding NSUTF8StringEncoding

User · Answer

First off  you should use dataUsingEncoding  instead of going through UTF8String  You only use UTF8String when you need a C string in that encoding   Then  for UTF-16  just pass NSUnicodeStringEncoding instead of NSUTF8StringEncoding in your dataUsingEncoding  message

User · Answer

For Swift 3  you will mostly be converting from String to Data   let myString    test  let myData   myString data using   utf8  print myData     Optional Data

[ios] How do I convert an NSString value to NSData?

Correction to the answer regarding the NULL terminator

Return Value

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