Convert unicode

Question

I have a UITextField to enter a unicode value , when i tap a UIButton need to convert it and showing in a UILabel.
Th

Answer 1

0D05 is just a hexadecimal number. You can use NSScanner to parse the hexadecimal string into an integer, and then create a NSString containing the Unicode character.

NSString *hexString = yourInputField.text;

NSScanner *scanner = [NSScanner scannerWithString:hexString];
uint32_t unicodeInt;
if ([scanner scanHexInt:&unicodeInt]) {
    unicodeInt = OSSwapHostToLittleInt32(unicodeInt); // To make it byte-order safe
    NSString *unicodeString = [[NSString alloc] initWithBytes:&unicodeInt length:4 encoding:NSUTF32LittleEndianStringEncoding];
    yourOutputLabel.text = unicodeString;
} else {
    // Conversion failed, invalid input.
}

This works even with Unicodes > U+FFFF, such as 1F34C (thanks to R. Martinho Fernandes for his feedback).