How to use NULL character with NSString?

Question

In PHP, I can call base64_encode(\"\\x00\". $username. \"\\x00\". $password) and the \"\\x00\" represents a NULL character.

Now, in Objecti

Answer 1

Like this:

char bytes[] = "\0username\0password";
NSData * data = [NSData dataWithBytes:bytes length:sizeof(bytes)];

NSLog(@"%@", data);

Output:

2010-01-22 09:15:22.546 app[6443] <00757365 726e616d 65007061 7373776f 726400>

Or from NSString:

char bytes[] = "\0username\0password";
NSString * string = [[NSString alloc] initWithBytes:bytes length:sizeof(bytes) encoding:NSUTF8StringEncoding];
NSData * data = [string dataUsingEncoding:NSUTF8StringEncoding];

You can see the null bytes at the beginning, in between username/password and at the end - because the char[] is null terminated.