Question

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?

Answer 1

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];
}