Capture and share the full content of a WKWebView as a UIImage

sharewkwebview.m

-(void)shareHighlightsAsImage:(NSDictionary *)note
{
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"quotes" ofType:@"html"];
    NSString *fileContents = [NSString stringWithContentsOfFile: filePath encoding:NSUTF8StringEncoding error:nil];
    fileContents = [fileContents stringByReplacingOccurrencesOfString:@"{{url}}" withString:note[@"url"]];
    fileContents = [fileContents stringByReplacingOccurrencesOfString:@"{{title}}" withString:note[@"title"]];
    fileContents = [fileContents stringByReplacingOccurrencesOfString:@"{{datetime}}" withString:note[@"datetime"]];
    fileContents = [fileContents stringByReplacingOccurrencesOfString:@"{{highlights}}" withString:note[@"highlights"]];

    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    WKWebView *web = [[WKWebView alloc] initWithFrame:CGRectMake(self.view.frame.size.width, 0, 420, 480) configuration:config];
    web.navigationDelegate = self;
    [web loadHTMLString:fileContents baseURL:nil];

    [self.view addSubview:web];
}
- (void) webView:(WKWebView *) webView decidePolicyForNavigationAction:(WKNavigationAction *) navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy)) decisionHandler {
    decisionHandler(WKNavigationActionPolicyAllow);
}
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation
{
    [self performSelector:@selector(shareAsImage:) withObject:webView afterDelay:0.1];
}
-(void)shareAsImage:(WKWebView *)webView
{
    WKSnapshotConfiguration *configuration = [[WKSnapshotConfiguration alloc] init];
    configuration.rect = CGRectMake(0, 0, webView.scrollView.contentSize.width, webView.scrollView.contentSize.height);
    webView.frame = CGRectMake(self.view.frame.size.width, 0, webView.scrollView.contentSize.width, webView.scrollView.contentSize.height);
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [webView takeSnapshotWithConfiguration:configuration completionHandler:^(UIImage *snapshotImage, NSError *error) {
            [webView removeFromSuperview];
            NSArray *items = @[snapshotImage];
            UIActivityViewController *controller = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
            controller.excludedActivityTypes = @[UIActivityTypeCopyToPasteboard,UIActivityTypeAddToReadingList];
            //[controller setValue:title forKey:@"subject"];
            [controller setCompletionWithItemsHandler:^(NSString *activityType,
                                                        BOOL completed,
                                                        NSArray *returnedObjects,
                                                        NSError *error){
                [self doneWithResults:@{}];
            }];
            UIPopoverPresentationController *presentationController =
            [controller popoverPresentationController];
            presentationController.sourceView = self.view;
            [self presentViewController:controller animated:YES completion:nil];
        }];
    });
}