"Reverse" NSMutableArray's elements order

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How can I reverse a NSArray in Objective-C?

Is there a way to reverse the elements in a NSMutableArray?

Have you searched this site, or even taken a look at the suggestions made to you as you entered the title of your question? — BoltClock, Feb 13 '11 at 20:58

score 2 · Accepted Answer · edited May 23 '17 at 12:13

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How can I reverse a NSArray in Objective-C?

edited May 23 '17 at 12:13

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answered Feb 13 '11 at 20:58

Rog

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Particularly: http://stackoverflow.com/a/586529/999934 – Rob May 03 '13 at 15:30

score 2 · Answer 2 · answered Feb 13 '11 at 21:09

I don't think that there is an easy way to do it. Best way that I came up with is the exchangeObjectAtIndex:withObjectAtIndex: function.

pseudo code:

NSMutableArray* array = [NSMutableArray arrayWithObjects:@"1", @"2", @"3",nil];
for(i = 0, len = (int)[array count]/2; i < len; i++)
{
  [array exchangeObjectAtIndex:i withObjectAtIndex:([array count] - i - 1)];
}

Don't have the compiler open right at this moment but hopefully this does the trick.

"Reverse" NSMutableArray's elements order

2 Answers2