Add Day 25

Author: lareenmelo

Project4/Project4/ViewController.swift

@@ -11,6 +11,9 @@ import WebKit
 
 class ViewController: UIViewController, WKNavigationDelegate {
     var webView: WKWebView!
+    var progressView: UIProgressView!
+    var websites = ["apple.com", "hackingwithswift.com"]
+
 
     // gets called before viewDidLoad
     override func loadView() {
@@ -20,14 +23,17 @@ class ViewController: UIViewController, WKNavigationDelegate {
     }
 
     func openPage(action: UIAlertAction) {
-        let url = URL(string: "https://" + action.title!)!
+        let url = URL(string: "https://" + websites[0])!
         webView.load(URLRequest(url: url))
     }
 
     @objc func openTapped() {
         let ac = UIAlertController(title: "Open page…", message: nil, preferredStyle: .actionSheet)
-        ac.addAction(UIAlertAction(title: "apple.com", style: .default, handler: openPage))
-        ac.addAction(UIAlertAction(title: "hackingwithswift.com", style: .default, handler: openPage))
+       
+        for website in websites {
+            ac.addAction(UIAlertAction(title: website, style: .default, handler: openPage))
+        }
+        
         ac.addAction(UIAlertAction(title: "Cancel", style: .cancel))
         ac.popoverPresentationController?.barButtonItem = self.navigationItem.rightBarButtonItem
         present(ac, animated: true)
@@ -37,17 +43,49 @@ class ViewController: UIViewController, WKNavigationDelegate {
         super.viewDidLoad()
         // Do any additional setup after loading the view.
         navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Open", style: .plain, target: self, action: #selector(openTapped))
+       
+        progressView = UIProgressView(progressViewStyle: .default)
+        progressView.sizeToFit()
+        let progressButton = UIBarButtonItem(customView: progressView)
 
+        let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
+        let refresh = UIBarButtonItem(barButtonSystemItem: .refresh, target: webView, action: #selector(webView.reload))
+
+        toolbarItems = [progressButton, spacer, refresh]
+        navigationController?.isToolbarHidden = false
+
 
         let url = URL(string: "https://www.hackingwithswift.com")!
         webView.load(URLRequest(url: url))
         webView.allowsBackForwardNavigationGestures = true
+        
+        webView.addObserver(self, forKeyPath: #keyPath(WKWebView.estimatedProgress), options: .new, context: nil)
+
 
     }
 
     func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
         title = webView.title
     }
-
+    
+    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
+        if keyPath == "estimatedProgress" {
+            progressView.progress = Float(webView.estimatedProgress)
+        }
+    }
+    
+    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
+        let url = navigationAction.request.url
+        
+        if let host = url?.host {
+            for website in websites {
+                if host.contains(website) {
+                    decisionHandler(.allow)
+                    return
+                }
+            }
+        }
+        
+        decisionHandler(.cancel)
+    }
 }
-