Question

I’m going through my array and find at which index the searched word is at. I use that information to put space between the words until i reach the next word. I save that text, and then store it in a variable.

I’m suspecting that my comparison between the lastObject and the arr objectAtIndex: i is not working, but i can’t seem to figure out why?

NSArray *arr;

NSScanner *scanner = [NSScanner scannerWithString:_exerciseDocument];

while(![scanner isAtEnd])
{
    NSString *buffer;
    if([scanner scanCharactersFromSet:[NSCharacterSet whitespaceAndNewlineCharacterSet] intoString:&buffer])
        {
          [scanner scanUpToString:" " intoString:&buffer];          
          [scanner scanString:@" " intoString:nil];  
        }
    else
        {

        }

for(int i=0; i <arr.count; i++)
{
    NSString *stringToCheck = (NSString *)[arr objectAtIndex:i];
    if([stringToCheck isEqualToString:@"Fokus:"])
    {
        _descriptionIndex = i;
    }
    if([stringToCheck isEqualToString:@"Niveau:"])
    {
        _focusIndex = i;
    }
    if([stringToCheck isEqualToString:@"Redskab:"])
    {
        _niveauIndex = i;
    }
    if([stringToCheck isEqualToString:@"Vanddybde:"])
    {
        _equipmentIndex = i;
    }
}

_descriptiontToTextField = [[NSString alloc]init];
for(int i=1; i <_descriptionIndex; i++)
{
    if(![[arr lastObject] isEqual:[arr objectAtIndex:i]])
    {
        _descriptiontToTextField = [_descriptiontToTextField stringByAppendingString:[ arr objectAtIndex:i]];
        _descriptiontToTextField = [_descriptiontToTextField stringByAppendingString:@" "];
    }
    else
    {
        _descriptiontToTextField = [_descriptiontToTextField stringByAppendingString:[ arr objectAtIndex:i]];
    }
}

Answer 1

First, -[NSString componentsSeparatedByCharactersInSet:] doesn’t work the way you may think it does. If there are multiple spaces between words in _exerciseDocument, you’re going to end up with a lot of empty strings in arr, which is not what you want. You may want to consider the use of a NSScanner (which, by default, skips whitespace and newline characters) to create your array.

Second, arr contains strings, and no other kind of objects. Given this, you should be using -[NSString isEqualToString:] instead for your comparisons.

Third, is there a reason you’re starting your second loop at index 1 instead of index 0?