Thanks Alastair, it was a good hint and help.Cheers,
On Sat, May 9, 2009 at 4:51 AM, Alastair Houghton <
alast...@alastairs-place.net> wrote:
> On 8 May 2009, at 10:00, erappy wrote:
>
> Hi, I am trying to find way to convert the NSString object into its bit
>> pattern and convert that bit pattern into another NSString object,
>> For Example if I have
>> NSString *origStr = @"Hello":
>> NSString * bitPatternoforigStr ;
>> no I want to convert it to the bit pattern if Hello and return an object
>> of
>> type NSString with bit pattern.
>> it should be something like;
>> bitPatternoforigStr = @"0101101001100010010011111000010101100101" ;
>> Can someone help me in this.
>>
>
> You need to start by deciding what encoding you wish to use for your
> string. NSString, broadly speaking, works as if it is a container for
> UTF-16 code units. It isn't always implemented that way under the covers,
> but you can assume that it behaves that way. If UTF-16 is what you need,
> you could simply iterate over the string in a loop doing something like
> this:
>
> NSUInteger len = [myString length];
> for (NSUInteger n = 0; n < len; ++n) {
> unichar ch = [myString characterAtIndex:n];
>
> // Turn ch (which is 16 bits in length) into binary and append it to
> your result string
> }
>
> Often you might not want UTF-16 though, and in that case you can use
> NSString's -dataUsingEncoding: method to convert the string to an NSData
> containing data in the desired encoding. Then you might loop over it
> differently, e.g.
>
> #include <inttypes.h>
>
> ...
>
> NSData *stringData = [myString dataUsingEncoding:NSUTF8StringEncoding];
> NSUInteger dataLen = [stringData length];
> const uint8_t *bytes = (const uint8_t *)[stringData bytes];
>
> for (NSUInteger n = 0; n < dataLen; ++n) {
> // Turn bytes[n] into binary and append it to your result string
> }
>
> Converting an integer into a binary string is a trivial programming
> exercise, so you should be able to do that part on your own.
>
> Kind regards,
>
> Alastair.
>
> --
> http://alastairs-place.net
>
>
>
>
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