1. NSString *string = @"5";
  2. int value = [string intValue];
  3.  
  4. NSString *string = /* Assume this exists. */;
  5. int value = [string intValue];
  6.  
  7. [@"7" intValue];
  8.  
  9. [NSNumberFormatter numberFromString:@"7"];
  10.  
  11. NSInteger stringToInt(NSString *string) {
  12. return [string integerValue];
  13. }
  14.  
  15. NSString* intToString(NSInteger integer) {
  16. return [NSString stringWithFormat:@"%d", integer];
  17. }