Sorting NSMutableArray with custom class by date

Question

I have NSMutableArray named "allConversations" that contains a custom class "Users". every user have property "lastMessageDate".

e.x : user.lastMessageDate;

what is the best way to sort the array by date?

I have this code :

  NSMutableArray *arrCopy = [[NSMutableArray alloc]initWithArray:unSortedArr];
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"lastMessageDate" ascending:TRUE];
    [arrCopy sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];

but I don't know how to implement it in this situation

What happens when you you use lastMessageDate instead of createdAt? — Sergey Kalinichenko
– Sergey Kalinichenko, Commented Nov 24, 2014 at 13:56
My mistake, the "createdAt" is the "lastMessageDate". I changed it now — Asi Givati
– Asi Givati, Commented Nov 24, 2014 at 14:02

Alex Brown · Accepted Answer · 2014-11-24 13:57:21Z

1

it seems all you are missing is the assignment. This should work for you.

arrCopy = [arrCopy sortedArrayUsingDescriptors:@[[[NSSortDescriptor alloc] initWithKey:@"createdAt" ascending:YES]]];

answered Nov 24, 2014 at 13:57

Alex Brown

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