iOS NSArray Sorting

Question

I have a nested array and want to sort it by a key present inside the inner array. below given is my array which I want to sort using NSSortDescriptor or in other way.

fares(
{
    pid = 1;
    type1 = (
    {
        color = "red";
        size = "big";
        properties = (
        {
            mod = "auto";
            payment = "EMI";
            moresegs = (
            {
                id = 141;
                name = "abcd";
                duration = "1 year"
            })
        })
    });
    type2 = (
    {
        color = "green";
        size = "small";
        properties = (
        {
            mod = "auto";
            payment = "EMI";
            moresegs = (
            {
                id = 141;
                name = "abcd";
                duration = "1 year"
            })
        })
    })
}

{
    pid = 1;
    type1 = (
    {
        color = "red";
        size = "big";
        properties = (
        {
            mod = "auto";
            payment = "EMI";
            moresegs = (
            {
                id = 141;
                name = "abcd";
                duration = "1 year"
            })
        })
    });
    type2 = (
    {
        color = "green";
        size = "big";
        properties = (
        {
            mod = "auto";
            payment = "EMI";
            moresegs = (
            {
                id = 141;
                name = "abcd";
                duration = "1 year"
            })
        })
    })
})

How can i sort above array using key "type2->properties->payment"?

-------update-----------

I modified the array and used NSSortDescriptor which solved my problem

Please format your code. Unlike computers, us humans can't read random splurges of text. It isn't hard to format correctly. Just do it. — Fogmeister, Sep 26 '13 at 06:47

score 2 · Answer 1 · answered Sep 26 '13 at 06:06

2

Try this:

NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"type1.size" ascending:YES];
NSArray *finalArray = [self.firstArray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:descriptor,nil]];

answered Sep 26 '13 at 06:06

Anil

2,394
2
32
49

@PrafulKadam just replace "type1.size" from this answer with "type2.properties.payment". This will sort the array how you want. – Fogmeister Sep 26 '13 at 06:49
The questions was edited I think. As @Fogmeister mentioned, change "type1.size" to "type2.properties.payment" – Anil Sep 26 '13 at 07:00
-[__NSArrayI compare:]: unrecognized selector sent to instance 0x825f410 – Praful Kadam Sep 26 '13 at 07:23

Xcoder · Answer 2 · 2013-09-26T06:40:56.767

0

Try this by inputing the fares array into this method-

+(NSArray*)sortedListBySize:(NSArray*)_unsortedList{
    NSArray *sortedListBySize = [_unsortedList sortedArrayUsingComparator:(NSComparator)^(id obj1, id obj2){

        if ([[obj1 valueForKeyPath:@"type2.properties.payments" ] intValue] < [[obj1 valueForKeyPath:@"type2.properties.payments"] intValue]) {
            return NSOrderedAscending;
        } else if ([[obj1 valueForKeyPath:@"type2.properties.payments" ] intValue] > [[obj1 valueForKeyPath:@"type2.properties.payments"] intValue]) {
            return NSOrderedDescending;
        }
        return NSOrderedSame;
    }];
    return sortedListBySize;
}

edited Sep 26 '13 at 06:40

answered Sep 26 '13 at 06:28

Xcoder

1,747
13
17

payments is not an intvalue-> that was my assumption. Thats why I wrote [payment(NSString) intValue]. You need not use it then- just use [obj1 valueForKeyPath:@"type2.properties.payments"] <.> – Xcoder Sep 26 '13 at 06:40
tried this but it is sorting randomly and not by payments key – Praful Kadam Sep 26 '13 at 06:48
I was actually thinking payments as quantity. You will have to specify the kind of sort you need here. – Xcoder Sep 26 '13 at 06:52
ok suppose it is duration like "10:00", "02:30",..... in this case how can i sort can you please explain. I am trying to solve this since long time – Praful Kadam Sep 26 '13 at 06:53
You will have to construct NSDate objects from these strings and compare them within the block. See this http://stackoverflow.com/questions/805547/how-to-sort-an-nsmutablearray-with-custom-objects-in-it – Xcoder Sep 26 '13 at 06:59

iOS NSArray Sorting

2 Answers2