Question

我正在使用WKWebView来显示来自远程URL的pdf文件。它在iOS 12中工作正常，但在iOS 13中仅显示空白屏幕。我使用图片网址访问了同一个域，效果很好，但是仅pdf个文件存在一些问题。

let myURL = URL(string:"somefileurl.pdf") // If I hit this url in safari, It will download a pdf file.
let myRequest = URLRequest(url: myURL!)
webViewPdf.load(myRequest)

Answer 1

我发现响应的内容类型是“应用程序/八位字节流” ，而不是“应用程序/ pdf” < / p>

因此，我将WKWebView加载为：

if let myURL = URL(string:"somefileurl.pdf") {
    if let data = try? Data(contentsOf: myURL) {
       webViewPdf.load(data, mimeType: "application/pdf", characterEncodingName: "", baseURL: myURL)
    }
}

Answer 2

UIWebView也有同样的问题。固定为follow（objective-c）：

[self.webView loadData:data MIMEType:@"application/pdf" textEncodingName:@"" baseURL:[NSURL URLWithString:@"FilePathOrUrlString"];

Answer 3

只需实现WKNavigationDelegate中可用的definePolicyFor方法，如下所示，

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
   decisionHandler(.allow)
}

并在网络视图中设置委托，如下所示，

yourWebView.navigationDelegate = self

Answer 4

对于PDF，请尝试“在我的案例中工作100％

func openFile(url:URL){
self.displayDocument(filePath: url, type: "pdf")
}



 extension Your ViewControler Name :UIDocumentInteractionControllerDelegate{

            public func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
                UINavigationBar.appearance().tintColor = UIColor.blue
                return self
            }

            public func documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) {
                UINavigationBar.appearance().tintColor = UIColor.clear
                self.documentInteractionController = nil
            }
            func documentInteractionControllerDidDismissOptionsMenu(_ controller: UIDocumentInteractionController) {
                UINavigationBar.appearance().tintColor = UIColor.clear
                self.navigationController?.dismiss(animated: false, completion: nil)
            }

            func displayDocument(filePath:URL,type:String){
                SVProgressHUD.dismiss()

                self.documentInteractionController = UIDocumentInteractionController(url:filePath )
                // Preview PDF
                self.documentInteractionController.delegate = self
                self.documentInteractionController.presentPreview(animated: true)
            }
        }

iOS 13 WKWebView不再显示pdf文件

4 个答案: