I'm trying to convert a Hex NSString
to NSData
(I'm using the below attached code). The following is the output:
<00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000>
which looks totally irrelevant to me. Any idea/ suggestions on where its going wrong?
NSString *strData = @"72ff63cea198b3edba8f7e0c23acc345050187a0cde5a9872cbab091ab73e553";
NSLog(@"string Data length is %d",[strData length]);
NSMutableData *commandToSend= [[NSMutableData alloc] init];
unsigned char whole_byte;
char byte_chars[2];
int i;
for (i=0; i < [strData length]/2; i++) {
byte_chars[0] = [strData characterAtIndex:i*2];
byte_chars[1] = [strData characterAtIndex:i*2+1];
whole_byte = strtol(byte_chars, NULL, [strData length]);
[commandToSend appendBytes:&whole_byte length:1];
}
NSLog(@"%@", commandToSend);
NSString *command = @"72ff63cea198b3edba8f7e0c23acc345050187a0cde5a9872cbab091ab73e553";
command = [command stringByReplacingOccurrencesOfString:@" " withString:@""];
NSMutableData *commandToSend= [[NSMutableData alloc] init];
unsigned char whole_byte;
char byte_chars[3] = {'\0','\0','\0'};
int i;
for (i=0; i < [command length]/2; i++) {
byte_chars[0] = [command characterAtIndex:i*2];
byte_chars[1] = [command characterAtIndex:i*2+1];
whole_byte = strtol(byte_chars, NULL, 16);
[commandToSend appendBytes:&whole_byte length:1];
}
NSLog(@"%@", commandToSend);