OK, I have sussed it. First, in the info.plist I added: <key>NSAppTransportSecurity</key> <dict> <key>NSExceptionDomains</key> <dict> <key>yourserver.com</key> <dict> <!--Include to allow subdomains--> <key>NSIncludesSubdomains</key> <true/> <!--Include to allow HTTP requests--> <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key> <true/> <!--Include to specify minimum TLS version--> <key>NSTemporaryExceptionMinimumTLSVersion</key> <string>TLSv1.1</string> </dict> </dict> </dict> Then in the ViewController, it now looks like: import UIKit import WebKit import CoreLocation class ViewController: UIViewController, WKNavigationDelegate { var webView: WKWebView! override func loadView() { webView = WKWebView() webView.navigationDelegate = self view = webView let url = URL(string: "https://domain.com")! webView.load(URLRequest(url: url)) webView.allowsBackForwardNavigationGestures = true webView.navigationDelegate = self } func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) { if navigationAction.navigationType == .linkActivated { if let url = navigationAction.request.url, UIApplication.shared.canOpenURL(url) { UIApplication.shared.open(url) decisionHandler(.cancel) } else { // Open in web view decisionHandler(.allow) } } else { // other navigation type, such as reload, back or forward buttons decisionHandler(.allow) } } } And so far, it works.

I have a feeling this is what is working: import UIKit import WebKit import CoreLocation class ViewController: UIViewController, WKNavigationDelegate { var webView: WKWebView! override func loadView() { webView = WKWebView() view = webView let url = URL(string: "https://domain.com")! webView.load(URLRequest(url: url)) webView.allowsBackForwardNavigationGestures = true webView.navigationDelegate = self } func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) { if navigationAction.navigationType == .linkActivated { if let url = navigationAction.request.url, let host = url.host, host.hasPrefix("domain.com") != UIApplication.shared.canOpenURL(url) { UIApplication.shared.open(url) decisionHandler(.cancel) } else { // Open in web view decisionHandler(.allow) } } else { // other navigation type, such as reload, back or forward buttons decisionHandler(.allow) } } } This seems to be working as I would expect.

Thanks for your reply, but unfortunately, it doesn't seem to do the job. The error in full that I am getting this evening is: CodeSign /Users/user/Documents/GitHub/MyApp/MyApp/DerivedData/MyApp/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/InstallationBuildProductsLocation/Applications/MyApp.app (in target 'MyApp' from project 'MyApp') cd /Users/user/Documents/GitHub/MyApp/MyApp Signing Identity: "Apple Development: My Name (REDACTED)" Provisioning Profile: "iOS Team Provisioning Profile: REDACTED" (REDACTED) /usr/bin/codesign --force --sign {REDACTED} --entitlements /Users/user/Documents/GitHub/MyApp/MyApp/DerivedData/MyApp/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/IntermediateBuildFilesPath/MyApp.build/Release-iphoneos/MyApp.build/MyApp.app.xcent --generate-entitlement-der /Users/user/Documents/GitHub/MyApp/MyApp/DerivedData/MyApp/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/InstallationBuildProductsLocation/Applications/MyApp.app /Users/user/Documents/GitHub/MyApp/MyApp/DerivedData/MyApp/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/InstallationBuildProductsLocation/Applications/MyApp.app: resource fork, Finder information, or similar detritus not allowed Command CodeSign failed with a nonzero exit code When I run: xattr -lr MyApp.app I get the following output: MyApp.app/Base.lproj/Main.storyboardc: com.apple.FinderInfo: MyApp.app/Base.lproj/Main.storyboardc: com.apple.fileprovider.fpfs#P: MyApp.app/Base.lproj/LaunchScreen.storyboardc: com.apple.FinderInfo: MyApp.app/Base.lproj/LaunchScreen.storyboardc: com.apple.fileprovider.fpfs#P: MyApp.app: com.apple.FinderInfo: MyApp.app: com.apple.fileprovider.fpfs#P: When I run: xattr -cr MyApp.app It does something, but I am still presented with the same error. Now to complicate things, even though I get the same error, the Applications directory isn't being generated. I can't understand why there would be forks in the StoryBoards, I do have some RSS feeds and links out.

I have tried everything suggested from the post by DTS engineer, but I still can't get it working. I am now getting something slightly different: Command CodeSign failed with a nonzero exit code