How can I subtract two NSUInteger variables?

Question

Is there any way of subtract two or more NSUInteger values with Objective-C?

This is my code

__block NSUInteger *removedElementsCount = 0;
__block BOOL lastIsSuperElement = NO;
// Get the elements not collapsed
[_elements enumerateObjectsUsingBlock:^(id  __nonnull obj, NSUInteger idx, BOOL * __nonnull stop) {
    if (_isHidingSubElementsBlock(obj)){
        //_collapseSubCellsAtIndexPathBlock(idx+_elementsOffset);
        [elementToRemove addObject:(Task *)obj];
        lastIsSuperElement = YES;
        [indexPathToRemove addObject:[NSIndexPath indexPathForRow:(idx-removedElementsCount) inSection:0]];
        removedElementsCount = 0;
    } else if (lastIsSuperElement){
        removedElementsCount++;
        lastIsSuperElement = NO;
    }
}];

When I try to create a new NSIndexPath with idx-removedElementsCount, I get the following error:

HTReorderTableCells.m:231:75: Invalid operands to binary expression ('NSUInteger' (aka 'unsigned int') and 'NSUInteger *' (aka 'unsigned int *'))

I have looked for a solution but I haven't found anything.

Answer 1

Use NSInteger for your solution.

NSUInteger value1 = 5;
NSUInteger value2 = 3;
NSInteger subs = value1 - value2;

In your code fix the declaration of removedElementsCount (remove *)