WKWebView does not load https URL?

Question

I have a WKWebView which should load the following url:

https://buchung.salonmeister.de/place/#offer-details-page?id=907599&venueId=301655 

Her is the code I use:

import UIKit import WebKit   class MMWKBrowserController: UIViewController {    private let closeButtonSelector: Selector = "closeButtonTapped:"    private var urlString: String   private let request: NSMutableURLRequest    private var webView: WKWebView!   private var twoLineTitleView: UIView!   private var titleLabel: UILabel?   private var subTitleLabel: UILabel?   private var indicator: UIActivityIndicatorView!     init(urlString: String) {     self.urlString = urlString      println("*** Using MMWKBrowserController ***")      var url: NSURL? = NSURL(string: urlString)     if url == nil {       var escapedString: String = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!       self.urlString = escapedString       url = NSURL(string: escapedString)     }      println("url: \(url)")     request = NSMutableURLRequest(URL: url!)      request.setValue("Mozilla/5.0 (iPhone; CPU iPhone OS 8_4 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12H141 Safari/600.1.4", forHTTPHeaderField: "UserAgent")      super.init(nibName: nil, bundle: nil)   }    required init(coder aDecoder: NSCoder) {     fatalError("init(coder:) has not been implemented")   }     deinit {     self.webView.removeObserver(self, forKeyPath: "loading")     self.webView.removeObserver(self, forKeyPath: "title")     self.webView.removeObserver(self, forKeyPath: "URL")     self.webView.removeObserver(self, forKeyPath: "estimatedProgress")     self.webView.stopLoading()   }     override func viewDidLoad() {     super.viewDidLoad()     createNavigationView()       self.navigationController?.navigationBar.tintColor = MGColor.actionColor      let config = WKWebViewConfiguration()     self.webView = WKWebView(frame: self.view.bounds, configuration: config)     self.view.addSubview(self.webView)       indicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.Gray)     //indicator.backgroundColor = UIColor(white: 0.1, alpha: 0.5)     webView.addSubview(indicator)      self.webView.snp_makeConstraints { (make) -> Void in       make.edges.equalTo(self.view)     }      indicator.snp_makeConstraints { (make) -> Void in       make.center.equalTo(self.webView)     }      webView.addObserver(self, forKeyPath: "loading", options: NSKeyValueObservingOptions.New, context: nil)     webView.addObserver(self, forKeyPath: "title", options: NSKeyValueObservingOptions.New, context: nil)     webView.addObserver(self, forKeyPath: "URL", options: NSKeyValueObservingOptions.New, context: nil)     webView.addObserver(self, forKeyPath: "estimatedProgress", options: NSKeyValueObservingOptions.New, context: nil)   }     override func viewDidDisappear(animated: Bool) {     super.viewDidDisappear(animated)     self.webView.stopLoading()   }     private func createNavigationView() {     let closeItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Stop, target: self, action: closeButtonSelector)     self.navigationItem.leftBarButtonItem = closeItem      // create center view     let titleViewWidth = self.view.frame.size.width - 100      twoLineTitleView = UIView(frame: CGRectMake(0, 0, titleViewWidth, 44))      titleLabel = UILabel(frame: CGRectMake(0, 6, titleViewWidth, 16))     titleLabel?.backgroundColor = UIColor.clearColor()     titleLabel?.font = UIFont.boldSystemFontOfSize(16)     titleLabel?.textAlignment = NSTextAlignment.Center      subTitleLabel = UILabel(frame: CGRectMake(0, 21, titleViewWidth, 20))     subTitleLabel?.backgroundColor = UIColor.clearColor()     subTitleLabel?.font = UIFont.systemFontOfSize(10)     subTitleLabel?.textAlignment = NSTextAlignment.Center      twoLineTitleView.addSubview(titleLabel!)     twoLineTitleView.addSubview(subTitleLabel!)     self.navigationItem.titleView = twoLineTitleView   }      override func viewWillAppear(animated: Bool) {     super.viewWillAppear(animated)      self.webView.loadRequest(self.request)    }     func closeButtonTapped(sender: UIBarButtonItem) {     self.presentingViewController?.dismissViewControllerAnimated(true, completion: nil)   }     override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {      if let wk = object as? WKWebView {       switch keyPath {       case "loading":         if let val: AnyObject = change[NSKeyValueChangeNewKey] {           if let val = val as? Bool {             if val {               self.indicator.startAnimating()             }             else {               self.indicator.stopAnimating()             }           }         }       case "title":         self.titleLabel?.text = self.webView.title       case "URL":         self.subTitleLabel?.text = self.webView.URL?.URLString       case "estimatedProgress":         println("progress: \(Int32(self.webView.estimatedProgress*100))")        default: break       }     }   }   } 

Note: I use SDK iOS 8.4

Why does mobile Safari loads this url but WKWebView does not?

Answer 1

Add this to your plist

<key>NSAppTransportSecurity</key> <dict>     <key>NSAllowsArbitraryLoads</key>     <true/> </dict> 

Here's the explanation for this change in 9.0 http://ste.vn/2015/06/10/configuring-app-transport-security-ios-9-osx-10-11/

Also if you want to set it up more secure it gives you a more complex way to do that.

Answer 2

For me, the issue was caused by server trust check from the WKWebView.

To fix this I had to handle the challenge authentication callback and return a server trust credential.

Swift 4

func webView(_ webView: WKWebView,      didReceive challenge: URLAuthenticationChallenge,      completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)  {     if(challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust)     {         let cred = URLCredential(trust: challenge.protectionSpace.serverTrust!)         completionHandler(.useCredential, cred)     }     else     {         completionHandler(.performDefaultHandling, nil)     } }