CODEWITHSUNDEEP
iosarraysxcodesortingnssortdescriptor
Ujesh
Ujesh

Reputation: 1758

NSSortDescriptor issue with sorting single and double digits number

i sort my array by experience using this code 

sortexp = [NSSortDescriptor sortDescriptorWithKey: @"Experience" ascending:YES];

arrData = [arrData sortedArrayUsingDescriptors: [NSArray arrayWithObject: sortexp]];

NSLog(@"%@",arrData);
[tblResponseData reloadData];     
NSLog(@"Experience");

but problem is that it's wrong count when compare single digits and double digits number.

example - array = {10,3,11,35,6,7} and after sort it will array = {10,11,3,35,6,7}

so how can i convert my single digit number in double digits using prefix 0 with number , my data is come from server so i can't change it so i do it's my side.

Upvotes: 0

Views: 755

Answers (1)

iHulk
iHulk

Reputation: 4909

Basically this is happening because you are sorting your numbers as string so it gives result in such a way (3 > 11 means it compares only first digit and if first digit same then compare next one) , you do not need to change the digits but sort them according to numbers not as string. For this you should use

sortexp = [NSSortDescriptor sortDescriptorWithKey: @"Experience" ascending:YES selector:@selector(localizedStandardCompare:)];

It will compare your numbers as number and string as string.

EDIT:

You can sort Using blocks as well.

NSArray *sortedArray = [array sortedArrayUsingComparator: ^(id obj1, id obj2) {

 if ([[obj1 valueForKey:@"Experience"] integerValue] > [[obj2 valueForKey:@"Experience"] integerValue]) {
      return (NSComparisonResult)NSOrderedDescending;
 }

 if ([[obj1 valueForKey:@"Experience"] integerValue] < [[obj2 valueForKey:@"Experience"] integerValue]) {
      return (NSComparisonResult)NSOrderedAscending;
 }
 return (NSComparisonResult)NSOrderedSame;
}];

Upvotes: 7

Related Questions