Sort an array with respect to the Date in iphone sdk

I have a tableview with values loaded from a web service. Which contains date value, here is how it looks like :

"Title":"Title1", 
"StartDate":"9\/15\/2011 12:00:00 AM",
"EndDate":"10\/15\/2011 12:00:00 AM".

I have done formatting using NSDateFormatter, I got the output as:

theDate: |09/22/2011| 
theTime: |14:09:30 PM| 

Now I need to sort the Title in the tableview with respect to the corresponding dates of each title. How can I implement that? Please share your ideas...

And I need to implement th开发者_C百科is function on a button action, that is the sorting function should be performed on a button action.

Thank you...

NSSortDescriptor* nameSorter = [[NSSortDescriptor alloc] initWithKey:@"startDate" ascending:NO];
NSMutableArray *temp = [yourArray mutableCopy];
[temp sortUsingDescriptors:[NSArray arrayWithObject:nameSorter]];
yourArray = temp;
[self.tableView reloadData];

The same goes with titles as well.