Nsstring, Char, and nsdata conversion for iPhone

1. nsstring conversion to Unicode string:


(Nsstring *) fname = @ "test ";




Char fnamestr [10];


Memcpy (fnamestr, [fname cstringusingencoding: nsunicodestringencoding], 2 * ([fname length]);

2. nsstring conversion to Char


(Nsstring *) fname = @ "test ";


Char fnamestr [10];


Fnamestr = [fname utf8string];


3. Char-> nsdata:


Method 1:


Char * postdata = "test ";




Nsdata * Data = [nsdata datawithbytes: postdata length: strlen (postdata)];


Method 2:


Convert to nsstring:-(ID) initwithuf8string :( const char *) bytes

Then use nsstring-(nsdata *) datausingencoding :( nsstringencoding) Encoding


4. nsdata-> char


Nsdata returndata;


Char * bu = [returndata bytes];


5. nsdata-> nsstring




Nsstring * astr;


Astr = [[nsstring alloc] initwithdata: aData encoding: nsasciistringencoding];


6. nsstring-> nsdata


Nsdata * aData;


AData = [astr datausingencoding: nsasciistringencoding];