Best way to generate NSData object with random bytes of a specific length?

Question

If I create a new NSData object of a specific size using dataWithBytes:length:, what is the most efficient way to create the input bytes (20 Mb worth) of random characters, pref

Answer 1

I've open sourced my JFRandom class over at github which can do exactly this. Here's a blog post demonstrating how to obtain/use it to achieve your goal...

http://jayfuerstenberg.com/devblog/generating-random-numbers-strings-and-data-in-objective-c