Sort array that contain alphanumeric words in iOS [duplicate]

Question

I have a array with 10 elements called products which is sorted by default, this is the current log now.

for (int i=0;i<products.count; i++)
{
     NSLog(@"%@",products[i]);
}

The Output:

Product1
Product10
Product2
Product3
Product4
Product5
Product6
Product7
Product8
Product9

I need to sort it in following order:

Product1
Product2
Product3
Product4
Product5
Product6
Product7
Product8
Product9
Product10

My current method is to scan out the numbers and sort based on that, I was wondering if there is any other way or and default method in iOS that does this or should I have to stick with my current method of scanning the numbers in each element and then sort??

Fabiolafabiolas

May be you can change the Product Modul to include an int property, than when create the product object, setup the int value. After that just use this value to sort. – Caniff

Answer 1

You can use this code to sort array. Use NSNumericSearch to search the numeric value in string.

NSArray * products = [[NSArray alloc] initWithObjects:@"Product1",
                                                      @"Product10",
                                                      @"Product2",
                                                      @"Product3",
                                                      @"Product4",
                                                      @"Product5",
                                                      @"Product6",
                                                      @"Product7",
                                                      @"Product8",
                                                      @"Product9",
                                                      nil];

products = [products sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        return [(NSString *)obj1 compare:(NSString *)obj2 options:NSNumericSearch];
    }];

NSLog(@"products : %@", products);

And the log display :

products : (
    Product1,
    Product2,
    Product3,
    Product4,
    Product5,
    Product6,
    Product7,
    Product8,
    Product9,
    Product10
)

Hypognathous

this is called smart answer..thanks – Magnetograph

@i_Looser thank you... :) – Hypognathous

Using NSNumericSearch | NSCaseInsensitiveSearch ought to ensure capitalization doesn't mess up the sort too – Monroemonroy

Answer 2

NSSortDescriptor *sortDesc = [[NSSortDescriptor alloc]initWithKey:@"YourKeyName" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)];


self.products = [[self.products sortedArrayUsingDescriptors:[NSArray arrayWithObjects:sortDesc, nil]] mutableCopy];

For more details Apple Documentation

Rianon

This is incorrect. have you checked your code? – Normannormand

Returns products === ( Product1, Product10, Product2, Product3, Product4, Product5, Product6, Product7, Product8, Product9 ) – Normannormand

Yes I have checked before posting my answer. – Rianon

And at that time its returns correct values? Wonderss – Normannormand