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
– Fogmeister, Commented Sep 26, 2013 at 6:47

Anil · Accepted Answer · 2013-09-26 06:06:03Z

2

Try this:

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

answered Sep 26, 2013 at 6:06

Anil

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3 Comments

Fogmeister Over a year ago

@PrafulKadam just replace "type1.size" from this answer with "type2.properties.payment". This will sort the array how you want.

Anil Over a year ago

The questions was edited I think. As @Fogmeister mentioned, change "type1.size" to "type2.properties.payment"

Praful Kadam Over a year ago

-[__NSArrayI compare:]: unrecognized selector sent to instance 0x825f410

Xcoder · Accepted Answer · 2013-09-26 06:40:56Z

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, 2013 at 6:40

answered Sep 26, 2013 at 6:28

Xcoder

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5 Comments

Xcoder Over a year ago

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"] <.

Praful Kadam Over a year ago

tried this but it is sorting randomly and not by payments key

Xcoder Over a year ago

I was actually thinking payments as quantity. You will have to specify the kind of sort you need here.

Praful Kadam Over a year ago

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

Xcoder Over a year ago

You will have to construct NSDate objects from these strings and compare them within the block. See this stackoverflow.com/questions/805547/…

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