What I have so far: $//$ BitManipulationViewController.m

#import

#import "BitManipulationViewController.h$"$

#import "BitManipulationFunctions.h$"//$ Import the file containing your bit manipulation functions

@interface BitManipulationViewController $()$

@property $($weak$,$ nonatomic$)$ IBOutlet UITextField $*$inputTextField; $//$ Assume you have a UITextField in your storyboard for user input

@property $($weak$,$ nonatomic$)$ IBOutlet UILabel $*$outputLabel; $//$ Assume you have a UILabel for displaying output

@end

@implementation BitManipulationViewController

$-($IBAction$)$performBitManipulation:$($id$)$sender $\{$

NSString $*$inputValue $=$ self.inputTextField.text;

$//$ Check if the input value is zero

if $([$inputValue isEqualToString:@$"0"])\{$

$[$self displayErrorMessage:@"Input value cannot be zero."$]$;

return;

$\}$

$//$ Call the bit$-$counting subroutine $($Function B$)$

NSUInteger bitCount $=[$BitManipulationFunctions countBitsInRow:inputValue$]$;

$//$ Call the wraparound detection function $($Function C$)$

BOOL isWraparound $=[$BitManipulationFunctions detectWraparound:inputValue$]$;

$//$ Call the invalid bit$-$pattern detection function $($Function D$)$

BOOL isValidBitPattern $=[$BitManipulationFunctions isValidBitPattern:inputValue$]$;

$//$ Display the results

NSString $*$outputMessage $=[$NSString stringWithFormat:@"Bit Count: $\%$lu

Wraparound: $\%$@

Valid Bit Pattern: $\%$@$",$

$($unsigned long$)$bitCount$,$

isWraparound $?$ @"Yes" : @$"$No$",$

isValidBitPattern $?$ @"Yes" : @$"$No$"]$;

$[$self displayOutputMessage:outputMessage$]$;

$\}$

$-($void$)$displayErrorMessage:$($NSString $*)$message $\{$

UIAlertController $*$alertController $=[$UIAlertController alertControllerWithTitle:@"Error"

message:message

preferredStyle:UIAlertControllerStyleAlert$]$;

UIAlertAction $*$okAction $=[$UIAlertAction actionWithTitle:@$"$OK$"$

style:UIAlertActionStyleDefault

handler:nil$]$;

$[$alertController addAction:okAction$]$;

$[$self presentViewController:alertController animated:YES completion:nil$]$;

$\}$

$-($void$)$displayOutputMessage:$($NSString $*)$message $\{$

self.outputLabel.text $=$ message;

$\}$

$\}$

@end