convert a char to string

my code works great until know and, if I put a double digit number into the text field (like 12) nslog returns 2 single digit numbers (like 1 and 2). Now I need to put these 2 single digit numbers into 2 strings. can somebody help me. thanks in advance.

    NSString *depositOverTotalRwy = [NSString stringWithFormat:@"%@", [deposit text]];
NSArray *components = [depositOverTotalRwy
        开发者_如何学编程               componentsSeparatedByString:@"/"];
NSString *firstThird = [components objectAtIndex:0];
  for(int i = 0; i < [firstThird length]; i++)
{
   char extractedChar = [firstThird characterAtIndex:i];
   NSLog(@"%c", extractedChar);
}

You should be able to use -stringWithFormat:.

NSString *s = [NSString stringWithFormat:@"%c", extractedChar];

EDIT:

You can store them in an array.

NSMutableArray *digits = [NSMutableArray array];

for ( int i = 0; i < [s length]; i++ ) {
    char extractedChar = [s characterAtIndex:i];

    [digits addObject:[NSString stringWithFormat:@"%c", extractedChar]];
}

Try to print the value of firstThird using NSLog(), see what it exactly hold, you code seem correct,

Use characterAtIndex function for NSString to extract a character at known location

   - (unichar)characterAtIndex:(NSUInteger)index

Use as below

NSString *FirstDigit = [NSString stringWithFormat:@"%c", [myString characterAtIndex:0]];
NSString *SecondDigit  = [NSString stringWithFormat:@"%c", [myString characterAtIndex:1]];