how to convert NSString encoding to UTF8 - iphone

Question

I have done something like:
NSData *dt = [mystr dataUsingEncoding:NSWindowsCP1251StringEncoding];
NSString *str = [NSString alloc] initWithData:dt encoding:NSUTF8StringEncoding];
then NSLog(#"%#", str);
However, if 'mystr' is english then the NSLog would print it as is, but if mystr is Arabic (for ex.) NSLog will not print anything, so how can i change the encoding of mystr to UTF8 ?
thank you in advance.

Answer 1

Your first line creates some data that is in cp1251 encoding. Your second line says "read this data into a string, assuming that the bytes represent a UTF8 encoded string". But because the bytes represent a cp1251 encoded string, that's not likely to work very well.
NSString represents an ordered collection of characters. Internally it uses some encoding to store these characters in memory, but its interface provides an encoding-independent access to the string and you can therefore consider NSString to be encoding-agnostic. If what you want is a collection of bytes that represent the string in UTF8 encoding, then you don't want an NSString. You want to get an NSString to emit such a collection of bytes, perhaps using the -dataUsingEncoding: method you've already found.

Answer 2

Try this one
NSString *s = #"Some string";
const char *c = [s UTF8String];

Answer 3

import
#import "NSString+URLEncoding.h" and
#import "NSString+URLEncoding.m" files
after that where u r doing encode write in .h file this method
-(NSString *)urlEncodeUsingEncoding:(NSStringEncoding)encoding;
after that write in .m file method implementation
-(NSString *)urlEncodeUsingEncoding:(NSStringEncoding)encoding
{
return (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL,
(CFStringRef)self,
NULL,
(CFStringRef)#"!*'\"();:#&=+$,/?%#[]% ",
CFStringConvertNSStringEncodingToEncoding(encoding)));
}
after that use like this
NSString *keyword=#"sample text";
here pass ur string whatever
NSString *url = [NSString stringWithFormat:#"%#",[keyword urlEncodeUsingEncoding:NSUTF8StringEncoding]];
NSLog(#"%#",url);

Answer 4

Did you try [mystr UTF8String] ? This returns a char *

Answer 5

You can try this
1) NSString to NSData(NSWindowsCP1251StringEncoding
NSString *text=#"This is Sample Text Conversion.....";
NSData *data=[text dataUsingEncoding:NSWindowsCP1251StringEncoding];
2)Revers process.
NSString *textRev=[[NSString alloc]initWithData:data encoding:NSWindowsCP1251StringEncoding];
NSLog(#" Actual String.. %#",textRev);