Implement share/activity button on iOS

Multiplatform/iOS/Article/ActivityViewController.swift

@@ -0,0 +1,33 @@
+//
+//  ArticleShareView.swift
+//  Multiplatform iOS
+//
+//  Created by Maurice Parker on 7/13/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+import SwiftUI
+import Articles
+
+extension UIActivityViewController {
+	convenience init(url: URL, title: String?, applicationActivities: [UIActivity]?) {
+		let itemSource = ArticleActivityItemSource(url: url, subject: title)
+		let titleSource = TitleActivityItemSource(title: title)
+		self.init(activityItems: [titleSource, itemSource], applicationActivities: applicationActivities)
+	}
+}
+
+struct ActivityViewController: UIViewControllerRepresentable {
+
+	var title: String?
+	var url: URL
+
+	func makeUIViewController(context: Context) -> UIActivityViewController {
+		return UIActivityViewController(url: url, title: title, applicationActivities: [FindInArticleActivity(), OpenInSafariActivity()])
+	}
+
+	func updateUIViewController(_ controller: UIActivityViewController, context: Context) {
+	}
+
+}