i have a web browser app for macOS

– (void)viewDidLoad { [super viewDidLoad]; UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(rightButtonTapped:)]; self.navigationItem.rightBarButtonItem = rightButton; WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init]; _webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuration]; _webView.navigationDelegate = self; [self.view addSubview:_webView]; NSURL *url = [NSURL URLWithString:@”https://www.apple.com”]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; [_webView loadRequest:request]; } – (void)rightButtonTapped:(UIBarButtonItem *)sender { NSLog(@”self.webView.scrollView.contentSize.height:%f”, self.webView.scrollView.contentSize.height); WKSnapshotConfiguration* configuration = […]