Conversion of Nsstring,nsdata and Char in iOS, JSON string conversion to nsdictionary or Nsarray

1.NSString Convert to NSData object

nsdata* xmlData = [@ "testdata"

2.NSData Convert to NSString object

NSData **result = [[NSString alloc] Initwithdata:data  encoding:nsutf8stringencoding];

3.NSData conversion to char*

NSData *Char

4.char* Convert to NSData object

byte* tempdata = malloc (sizeof(byte) **content=[nsdata datawithbytes : TempData Length:+];

5. Convert the JSON string to Nsdictionary or Nsarray

    *error = nil;     ID jsonobject = [nsjsonserialization jsonobjectwithdata:jsondata                                                    options: Nsjsonreadingallowfragments                                                      Error:&error];

6. Convert nsdictionary or Nsarray to JSON string

Nserror *error = nil;     *jsondata = [nsjsonserialization datawithjsonobject:thedata                                                       options:nsjsonwritingprettyprinted                                                         Error: &error];

Attached: If the type has an error: This type of error occurs:

Conversion of Nsstring,nsdata and Char in iOS, JSON string conversion to nsdictionary or Nsarray