Merge pull request #2257 from stuartbreckenridge/ios-release

#2256

Shared/Extensions/URL-Extensions.swift

@@ -15,4 +15,13 @@ extension URL {
 		scheme == "mailto" ? URLComponents(url: self, resolvingAgainstBaseURL: false)?.path : nil
 	}
 	
+	func valueFor(_ parameter: String) -> String? {
+		guard let components = URLComponents(url: self, resolvingAgainstBaseURL: false),
+			  let queryItems = components.queryItems,
+			  let value = queryItems.first(where: { $0.name == parameter })?.value else {
+			return nil
+		}
+		return value
+	}
+	
 }

iOS/Article/WebViewController.swift

@@ -338,6 +338,7 @@ extension WebViewController: WKNavigationDelegate {
 				if MFMailComposeViewController.canSendMail() {
 					let mailComposeViewController = MFMailComposeViewController()
 					mailComposeViewController.setToRecipients([emailAddress])
+					mailComposeViewController.setSubject(url.valueFor("subject") ?? "")
 					mailComposeViewController.mailComposeDelegate = self
 					self.present(mailComposeViewController, animated: true, completion: {})
 				} else {