BitCount receives one parameter, a $32-$bit unsigned integer. It will f$//$ Call the $1$nvalid bit$-$pattern detection function $($Function D$)$

BOoL isvalidBitPattern $=[$BitManipulationFunctions isvalidBitPattern:inputvalue$]$;

$//$ Display the results

$($unsigned long$)$bitcount$,$

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

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

$[$self displayoutputMessage:outputMessage$]$;

$\}$

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

UIAlertcontroller $*$alertcontroller $=[$UIAlertcontroller alertcontrollerwithTitle:@"Error"

message:message

preferredstyle:UIAlertcontrollerstyle

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;

$\}$

@endind the rightmost and leftmost one bits. It will return one value, the distance between the leftmost and rightmost bits inclusive, an integer between zero and $32.$ This function does not just count bits with a value of one, which is a common programming problem.

$//$ BitManipulationviewController.m

#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:@$""])\{$

$[$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$]$;

$\frac{\frac{?}{?}}{?}$ Call the invalid bit$-$pattern detection function $($Function $D)$