NSSet *set = [[NSSet alloc] initWithObjects:@"40", @"30", @"31", @"3XL", @"44", @"46", @"50", @"52", @"54", @"56", @"48", @"33", @"L", @"M", @"S", @"XL", @"XS", @"XXS",@"XXL",nil];
NSArray *sizeArray = [set allObjects];
NSArray *sizes = @[@"XXS", @"XS", @"S", @"M", @"L", @"XL", @"XXL", @"3XL"];
NSArray *sortedArray = [sizeArray sortedArrayUsingComparator:^NSComparisonResult(NSString *obj1, NSString *obj2) {
NSUInteger index1 = [sizes indexOfObject:obj1];
NSUInteger index2 = [sizes indexOfObject:obj2];
if (index1 == NSNotFound && index2 == NSNotFound) {
return [@([obj1 intValue]) compare:@([obj2 intValue])];
}
else if (index1 == NSNotFound)
{
return NSOrderedAscending;
}
else if (index2 == NSNotFound)
{
return NSOrderedDescending;
}
return [@(index1) compare:@(index2)];
}];
NSLog(@"Set: %@ \n Sorted: %@", set, sortedArray);
Output:
Set: ( 46, 52, XL, XXS, 54, 48, 33, 44, 50, L, 40, M, S, 30, 56, XS, XXL, 3XL, 31 )
Sorted: (30, 31, 33, 40, 44, 46, 48, 50, 52, 54, 56, XXS, XS, S, M, L, XL, XXL, 3XL )