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iphone - Re-arrange NSArray/MSMutableArray in random order

I'm using NSArray/NSMutable array to store different objects. Once all the objects are added, I want to re-arrange them in random order. How can I do it?

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NSUInteger count = [yourMutableArray count];
for (NSUInteger i = 0; i < count; ++i) {
// Select a random element between i and end of array to swap with.
   int nElements = count - i;
   int n = (arc4random() % nElements) + i;
   [yourMutableArray exchangeObjectAtIndex:i withObjectAtIndex:n];
}

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