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Editorial Team
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Asked: 2026-06-14T21:18:50+00:00

I am sorting an NSMutableArray on my field date but it does not take

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I am sorting an NSMutableArray on my field “date” but it does not take into account the time. If the date is the same, the time is still sorted random. What am I doing wrong? The field “date” is of the type NSDate.

 NSSortDescriptor *dateDescriptor =
[[NSSortDescriptor alloc] initWithKey:@"date" ascending:YES];
NSArray *descriptors = [NSArray arrayWithObjects:dateDescriptor, nil];

[self.player1ScoreT sortedArrayUsingDescriptors:descriptors];

My output is:
2012-11-25 11:01:00 +0000
2012-11-25 11:00:56 +0000
2012-11-25 11:00:54 +0000
2012-11-25 11:01:03 +0000

Strange…..

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1 Answer

  1. Editorial Team

    The logic you’re using to sort is correct, I’ve just tried it and it works fine.

    I assume it’s because of [self.player1ScoreT sortedArrayUsingDescriptors:descriptors];, this will not change the array held in self.player1ScoreT, rather, it produces a new array. This is because you’re using a selector that will not mutate the original array (NSArray itself is not mutable by design, NSMutableArray is mutable).

    As such, you’ll want to use this:

    self.player1ScoreT = [self.player1ScoreT sortedArrayUsingDescriptors:descriptors];

    This will reassign the array within self.player1ScoreT to be the new sorted array, produced by sortedArrayUsingDescriptors:, and the old unsorted one will be discarded.

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