Easily interchange objects in NSMutableArray

Question

I have an NSMutableArray of UIViews that I put in UIScrollView which is responsible for putting them in order. Right now I have this code for changing two UIViews positions with each other:

UIView *viewToBeChanged = [views objectAtIndex:self.page];
UIView *previousView = [views objectAtIndex:previousPage];

[views removeObjectAtIndex:self.page];
[views removeObjectAtIndex:previousPage];

[views insertObject:viewToBeChanged atIndex:previousPage];
[views insertObject:previousView atIndex:self.page];

Is there a better way to change the position of an object in NSMutableArray with another one? Thanks!

You can use replaceObjectAtIndex: withObject: or exchangeObjectAtIndex:withObjectAtIndex: or replaceObjectAtIndex: withObjectAtIndex:as per your requirement. — Exploring
– Exploring, Commented Aug 19, 2013 at 13:29

Tala · Accepted Answer · 2013-08-19 13:41:35Z

5

You can use replaceObjectAtIndex:i method

 [array replaceObjectAtIndex:i withObject:newObj];

You can also use exchangeObjectAtIndex:withObjectAtIndex:

  [array exchangeObjectAtIndex:i withObjectAtIndex:j];

edited Aug 19, 2013 at 13:41

answered Aug 19, 2013 at 13:25

Tala

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