Sorting array of multiple dictionaries

Question

My array contains three dictionaries per object of the array.

{
    avg = {
        avg1 = 50;
        avg2 = 60;
    };

    posts =         {
        alcoholContent = 450;
        name = "BBB";
        origin = United States;

    };

    reviews =  {

        rev1 = "Test review 1";
        rev2 = "Test review 2";
    };
}

{
    avg = {
        avg1 = 30;
        avg2 = 20;
    };

    posts =         {
        alcoholContent = 550;
        name = "AAA";
        origin = United States;

    };

    reviews =  {

        rev1 = "Test review 1";
        rev2 = "Test review 2";
    };
}

I want to sort array acceding by key "name" (of post dictionary). How can I do it?

I tried normal sorting methods using sort descriptors, but did not work

Sort descriptors should work. Could you post an example of what you did? — Monolo
– Monolo, Commented Jan 7, 2013 at 9:30
Thanks for answer. This is what I did NSSortDescriptor *sortDescriptor; sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor]; NSArray *sortedArray; sortedArray = [arrItems sortedArrayUsingDescriptors:sortDescriptors]; — smartsanja
– smartsanja, Commented Jan 7, 2013 at 9:32

Roland Keesom · Accepted Answer · 2013-01-07 09:34:42Z

1

Try sortUsingComparator:

[array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
    NSDictionary *dict1 = obj1;
    NSDictionary *dict2 = obj2;

    NSString *string1 = [[dict1 objectForKey:@"posts"] objectForKey:@"name"];
    NSString *string2 = [[dict2 objectForKey:@"posts"] objectForKey:@"name"];

    return [string1 compare:string2];
}];

answered Jan 7, 2013 at 9:34

Roland Keesom

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