Using NSUInteger Input to insertObject:___ atIndex:___ - objective-c

Question

I'm trying to create a simple commandline tic-tac-toe game using an NSMutableArray.
Created a class called "Board" with the method "getPosition"
(I'm assuming this is the best way to get a user input)
I'm asking for position, then casting from int to NSUInteger)
#import "Board.h"
#implementation Board
-(void)getPosition;
{
int enteredPosition;
scanf("%i", &enteredPosition);
NSUInteger nsEnteredPosition = (NSUInteger ) enteredPosition;
NSLog(#"Position = %lu", (unsigned long)nsEnteredPosition);
}
#import <Foundation/Foundation.h>
#import "Board.h"
int main(int argc, const char * argv[])
{
#autoreleasepool {
NSString *currentPlayer;
NSMutableArray *gameBoard=[[NSMutableArray alloc] initWithCapacity:9];
for(int i; i<=2; i++)
{
if(i %2)
{
currentPlayer=#"X";
}
else
{
currentPlayer=#"O";
}
NSLog(#"Player %#, select an open spot 1 - 9 on the board", currentPlayer);
Board *currentPosition = [[Board alloc] init];
[currentPosition getPosition];
[gameBoard insertObject:currentPlayer atIndex:currentPosition]; //this is where i have a problem
}
As I understand it atIndex requires an NSUInteger parameter, but I'm receiving the error message:
"Incompatible pointer to integer conversion sending 'Board *_strong"
to parameter of type 'NSUInteger' (aka 'unassigned long')

Answer 1

You're using currentPosition as your index which is a Board object. Perhaps [currentPosition getPosition] is supposed to return an NSUInteger. If so, try rewriting the last portion of your code like this:
Board *theBoard = [[Board alloc] init];
NSUInteger currentPosition = [theBoard getPosition];
[gameBoard insertObject:currentPlayer atIndex:currentPosition]; //this is where i have a problem