Force Shuffle NSMutableArray

Question

I have a NSMutableArray called putNumberUsed. It contains the following objects @\"blah1,@\"blah2\",@\"blah3\",@\"blah4\". I want to shuffle these objects randomly so for ex

Answer 1

generate a random number for index

int randomInt = arc4random() % [putNumberUsed count];
[putNumberUsed objectAtIndex:randomInt];