To find Index Postions Of Given Character In String

index Postions Of Given Character InString...

- (void)indexPostionsOfGivenCharacterInString {

   NSString *positionString = @"RavindarReddy";

   NSMutableArray *detailPositionArray = [[NSMutableArray alloc]init];

    for (NSUInteger i=0;i<[positionString length];i++)

    {

        if ([positionString characterAtIndex:i] == [positionString characterAtIndex:8])

        {

            NSLog(@"%C -----> %lu",[positionString characterAtIndex:i],(unsigned long)i);

            [detailPositionArray addObject:[NSString stringWithFormat:@"%lu",(unsigned long)i]];

        }

    }

   NSLog(@"%@",detailPositionArray );

}