Question

I need to convert an NSString of hex values into an NSString of text (ASCII).
For example, I need something like:

"68 65 78 61 64 65 63 69 6d 61 6c" to be "hexadecimal"

I have looked at and tweaked the code in this thread, but it’s not working for me. It is only functional with one hex pair. Something to do with the spaces? Any tips or sample code is extremely appreciated.

Answer 1

Well I will modify the same thing for your purpose.

NSString * str = @"68 65 78 61 64 65 63 69 6d 61 6c";
NSMutableString * newString = [NSMutableString string];

NSArray * components = [str componentsSeparatedByString:@" "];
for ( NSString * component in components ) {
    int value = 0;
    sscanf([component cStringUsingEncoding:NSASCIIStringEncoding], "%x", &value);
    [newString appendFormat:@"%c", (char)value];
}

NSLog(@"%@", newString);