How do I make NSSortDescriptor for Array Work?

Question

I managed to create an Array of MyLocation objects with their distance property set in the first of 2 tabs in a tabBarController. In my 2nd tab I get it like so in viewDidLoad:

[self setAnnotationsToSort:myDelegate.annotationsToSort];

and right after this line I call this method:

-(void)sort{
    NSSortDescriptor *sortDescriptor;
    sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:@"distance" ascending:YES] autorelease];
    NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
    NSArray *sortedArray;
    sortedArray = [self.annotationsToSort sortedArrayUsingDescriptors:sortDescriptors];
    [self.tableView reloadData];
}

which should sort my Array. However my tableView currently loads with the unsorted version of the Array, self.annotationsToSort. How do I reload the tableView but force it to use the new sortedArray?

Jano · Accepted Answer · 2013-02-15 23:05:07Z

5

You are not doing anything with sortedArray. Try

self.annotationsToSort = [self.annotationsToSort sortedArrayUsingDescriptors:sortDescriptors];

answered Feb 15, 2013 at 23:05

Jano

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2 Comments

marciokoko Over a year ago

yeah i tried that but appartently the method sortedArrayUsingDescriptors returns an NSArray and my self.annotationsToSort is NSMutableArray

Roland Keesom Over a year ago

Just make it a mutableCopy so you can store it as a NSMutableArray

user1801247user1801247 · Accepted Answer · 2013-02-15 23:05:54Z

2

Call:

self.annotationsToSort = sortedArray;

Before you call [self.tableView reloadData];

answered Feb 15, 2013 at 23:05

user1801247

Comments

marciokoko · Accepted Answer · 2013-02-16 00:12:00Z

0

I was missing this step:

self.annotationsToSort = [(NSArray*)sortedArray mutableCopy];

thanks guys

answered Feb 16, 2013 at 0:12

marciokoko

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