Wrong encoding with cp1251

[nemozar]

Hi.

My qr code has encoding cp1251 and when i scan him a get string with wrong encoding.

didScanResult has NSString input. But when i attempt change encoding NSData has nill.

NSData *dt = [value dataUsingEncoding:NSWindowsCP1251StringEncoding];
value = [[NSString alloc] initWithData:dt encoding:NSUTF8StringEncoding];

when i get NSUTF8StringEncoding in dataUsingEncoding dt ha bytes in wrong encoding.