Sorting NSArray of dictionaries by value of a key in the dictionaries

Question

I have an array populated by dictionaries, and I need to sort the array alphabetically by the values of one of the keys of the dictionaries.

This is my array:

tu dictus: (     {     brand = Ryul;     productTitle = Any;     quantity = 1;     subBrand = "Ryul INJ";     type = Product; },     {     brand = Trol;     productTitle = Different;     quantity = 2;     subBrand = "";     type = Brand; },     {     brand = Dtor;     productTitle = Any;     quantity = 1;     subBrand = "";     type = Product; },     {     brand = Ryul;     productTitle = Different;     quantity = 2;     subBrand = "Ryul CHES";     type = SubBrand; },     {     brand = Anan;     productTitle = Any;     quantity = 1;     subBrand = "";     type = Product; } ) 

Normally for sorting an array I will use

myArray = [uniqueProdsArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)]; 

But how do sort using the brand key of the dictionary?

Answer 1

I think this will do it:

brandDescriptor = [[NSSortDescriptor alloc] initWithKey:@"brand" ascending:YES]; sortDescriptors = [NSArray arrayWithObject:brandDescriptor]; sortedArray = [myArray sortedArrayUsingDescriptors:sortDescriptors]; 

I pulled the code from Sort Descriptor Programming Topics. Also, Key-Value Coding comes into play, in that sortedArrayUsingDescriptors: will send a valueForKey: to each element in myArray, and then use standard comparators to sort the returned values.

Answer 2

We Got The Solution By Using The Method Follows

[self.jsonData sortUsingDescriptors: [NSArray arrayWithObjects: [NSSortDescriptor sortDescriptorWithKey:"fullname" ascending:YES], [NSSortDescriptor sortDescriptorWithKey:"id" ascending:NO], nil]]; 

Where:-

jsonData - MutableArray Which holds the Parsed JSON Data.

fullname - the data we want to sort.

id - An unique data which comes with the inner dictionary.