sort NSMutablearray having range objects

Question

I have add the range objects to NSMutable array ie [{5, 12} {0, 4} {18, 10}]. Now I want to sort this NSMutable array in increasing order. I am using the following code to get the NSMutable array objects in increasing order.

        NSArray *stringIndexes = [StringIndexes copy];
        stringIndexes = [stringIndexes sortedArrayUsingSelector:@selector(compare:)];
        NSLog(@"stringIndexes..:%@",stringIndexes);

But it is not giving the required output. If anyone know that how to sort the NSMutable array having range objects. Please help me out.

Thanks to all.

Answer 1

If you want to add ranges to an array, use

NSValue *value = [NSValue valueWithRange:(NSRange)range];

When you want to sort the array:

[myArray sortUsingComparator:^NSComparisonResult(NSValue *val1, NSValue *val2, BOOL *stop) {
  NSRange range1 = [val1 rangeValue];
  NSRange range2 = [val2 rangeValue];
  // you need to fine tune the test below - not sure what you want
  if(range1.location == range2.location) return NSOrderedSame;
  if(range1.location < range2.location) return NSOrderedAscending;
  if(range1.location > range2.location) return NSOrderedDescending;
  assert(!"Impossible");
  } ];