iPhone 'Development' Objective-C »Mobile

Very short snippet: iPhone, random numbers

Friday, October 9th, 2009

If you need to generate random numbers in an application from the Apple iPhone you have to put Objective-C, because it proposes no class for this purpose. The solution is that proposed by the C: rand(), srand(), random(), srandom() e arc4random()
Of all the most popular is definitely arc4random() because it does not require any special initialization or seeding functions, returning a good value "random", we could say that it is self-inizializzante.

PLAIN TEXT
Objective-C:
  1. / / Generate a random number from 0 to 99
  2. arc4random ( ) % 100 ; int rnd = arc4random ()% 100;
  4. / / Generate a random number from 20 to 50
  5. arc4random ( ) % 51 ) + 20 ; int rnd = (arc4random ()% 51) + 20;

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