打印WKWebView(OS X)的内容

Question

我正在尝试打印a的内容WkWebView,但是当打印面板出现时,打印预览为空.

这是代码:

- (void)viewDidLoad {
    [super viewDidLoad];

    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    _webView = [[WKWebView alloc] initWithFrame:self.webViewOutlet.frame configuration:config];
    [_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.google.com"]]];
    [_webViewOutlet addSubview:_webView];
    _webView.navigationDelegate = self;

}

我有一个插座,WKWebView所以我可以看到它是否已加载,我将print调用这样的didFinishNavigation委托方法,只是为了确保:

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    [self.webView print:nil];
}

无论页面是什么,打印预览始终是空白页面.我也试过使用NSPrintOperations,结果是一样的 - 打印预览和保存的PDF是空白页.

我有什么想法我做错了吗？还有另一种打印/转换WKWebView为PDF的方法吗？欢迎提出建议.谢谢.

Answer 1

WKWebView您可以打印with的内容viewPrintFormatter。这是示例代码：

if ([UIPrintInteractionController isPrintingAvailable])
{
    UIPrintInfo *pi = [UIPrintInfo printInfo];
    pi.outputType = UIPrintInfoOutputGeneral;
    pi.jobName = @"Print";
    pi.orientation = UIPrintInfoOrientationPortrait;
    pi.duplex = UIPrintInfoDuplexLongEdge;

    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
    pic.printInfo = pi;
    pic.showsPageRange = YES;
    pic.printFormatter = self.webView.viewPrintFormatter;
    [pic presentFromBarButtonItem:barButton animated:YES completionHandler:^(UIPrintInteractionController *printInteractionController, BOOL completed, NSError *error) {
        if(error)
            NSLog(@"handle error here");
        else
            NSLog(@"success");
    }];
}