Sort NSArray of date strings or objects

objective-c cocoa sorting nsarray nsdate
postalservice14 picture postalservice14 · Jul 15, 2009 · Viewed 82.2k times · Source

I have an NSArray that contains date strings (i.e. NSString) like this: "Thu, 21 May 09 19:10:09 -0700"

I need to sort the NSArray by date. I thought about converting the date string to an NSDate object first, but got stuck there on how to sort by the NSDate object.

Thanks.

Answer

vinzenzweber picture vinzenzweber · Oct 12, 2010

If I have an NSMutableArray of objects with a field "beginDate" of type NSDate I am using an NSSortDescriptor as below:

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"beginDate" ascending:TRUE];
[myMutableArray sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
[sortDescriptor release];

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