Ich habe den Code zum Konvertieren von String in HEX-String in Objective-C.

- (NSString *) CreateDataWithHexString:(NSString*)inputString
{
NSUInteger inLength = [inputString length];


unichar *inCharacters = alloca(sizeof(unichar) * inLength);
[inputString getCharacters:inCharacters range:NSMakeRange(0, inLength)];

UInt8 *outBytes = malloc(sizeof(UInt8) * ((inLength / 2) + 1));

NSInteger i, o = 0;
UInt8 outByte = 0;

for (i = 0; i < inLength; i++) {
    UInt8 c = inCharacters[i];
    SInt8 value = -1;

    if      (c >= '0' && c <= '9') value =      (c - '0');
    else if (c >= 'A' && c <= 'F') value = 10 + (c - 'A');
    else if (c >= 'a' && c <= 'f') value = 10 + (c - 'a');

    if (value >= 0) {
        if (i % 2 == 1) {
            outBytes[o++] = (outByte << 4) | value;
            outByte = 0;
        } else {
            outByte = value;
        }

    } else {
        if (o != 0) break;
    }
}

NSData *a = [[NSData alloc] initWithBytesNoCopy:outBytes length:o freeWhenDone:YES];
NSString* newStr = [NSString stringWithUTF8String:[a bytes]];
return newStr;

}

Ich möchte dasselbe in Swift. Kann jemand diesen Code in Swift übersetzen oder gibt es eine einfache Möglichkeit, dies in Swift zu tun?