Create random number from fix Set of numbers in iphone

Question

Suppose I have one set of numbers ie {1, 6, 3, 5, 7, 9} I want to generate a random number from this set of numbers, ie The generated number must be random and must only be from ({1, 6, 3, 5, 7, 9}).

the standard C / C ++ function will also be ...

Answer 1

arc4random% (set count) = random index.

Answer 2

, , . 0 5. . , # 2, №2 ( 0) , 3. № 5, 9.

MSalters , .