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+//
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+// SwiftWebVC.swift
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+//
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+// Created by Myles Ringle on 24/06/2015.
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+// Transcribed from code used in SVWebViewController.
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+// Copyright (c) 2015 Myles Ringle & Sam Vermette. All rights reserved.
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+//
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+
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+import WebKit
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+
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+public protocol SwiftWebVCDelegate: class {
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+ func didStartLoading()
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+ func didFinishLoading(success: Bool)
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+}
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+
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+public class SwiftWebVC: UIViewController {
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+
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+ public weak var delegate: SwiftWebVCDelegate?
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+ var storedStatusColor: UIBarStyle?
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+ var buttonColor: UIColor? = nil
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+ var titleColor: UIColor? = nil
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+ var closing: Bool! = false
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+
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+ lazy var backBarButtonItem: UIBarButtonItem = {
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+ var tempBackBarButtonItem = UIBarButtonItem(image: SwiftWebVC.bundledImage(named: "SwiftWebVCBack"),
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+ style: UIBarButtonItemStyle.plain,
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+ target: self,
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+ action: #selector(SwiftWebVC.goBackTapped(_:)))
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+ tempBackBarButtonItem.width = 18.0
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+ tempBackBarButtonItem.tintColor = self.buttonColor
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+ return tempBackBarButtonItem
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+ }()
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+
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+ lazy var forwardBarButtonItem: UIBarButtonItem = {
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+ var tempForwardBarButtonItem = UIBarButtonItem(image: SwiftWebVC.bundledImage(named: "SwiftWebVCNext"),
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+ style: UIBarButtonItemStyle.plain,
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+ target: self,
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+ action: #selector(SwiftWebVC.goForwardTapped(_:)))
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+ tempForwardBarButtonItem.width = 18.0
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+ tempForwardBarButtonItem.tintColor = self.buttonColor
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+ return tempForwardBarButtonItem
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+ }()
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+
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+ lazy var refreshBarButtonItem: UIBarButtonItem = {
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+ var tempRefreshBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.refresh,
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+ target: self,
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+ action: #selector(SwiftWebVC.reloadTapped(_:)))
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+ tempRefreshBarButtonItem.tintColor = self.buttonColor
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+ return tempRefreshBarButtonItem
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+ }()
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+
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+ lazy var stopBarButtonItem: UIBarButtonItem = {
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+ var tempStopBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.stop,
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+ target: self,
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+ action: #selector(SwiftWebVC.stopTapped(_:)))
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+ tempStopBarButtonItem.tintColor = self.buttonColor
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+ return tempStopBarButtonItem
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+ }()
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+
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+ lazy var actionBarButtonItem: UIBarButtonItem = {
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+ var tempActionBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.action,
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+ target: self,
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+ action: #selector(SwiftWebVC.actionButtonTapped(_:)))
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+ tempActionBarButtonItem.tintColor = self.buttonColor
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+ return tempActionBarButtonItem
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+ }()
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+
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+
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+ lazy var webView: WKWebView = {
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+ var tempWebView = WKWebView(frame: UIScreen.main.bounds)
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+ tempWebView.uiDelegate = self
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+ tempWebView.navigationDelegate = self
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+ return tempWebView;
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+ }()
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+
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+ var request: URLRequest!
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+
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+ var navBarTitle: UILabel!
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+
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+ ////////////////////////////////////////////////
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+
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+ deinit {
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+ webView.stopLoading()
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+ UIApplication.shared.isNetworkActivityIndicatorVisible = false
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+ webView.uiDelegate = nil;
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+ webView.navigationDelegate = nil;
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+ }
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+
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+ public convenience init(urlString: String) {
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+ self.init(pageURL: URL(string: urlString)!)
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+ }
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+
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+ public convenience init(pageURL: URL) {
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+ self.init(aRequest: URLRequest(url: pageURL))
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+ }
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+
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+ public convenience init(aRequest: URLRequest) {
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+ self.init()
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+ self.request = aRequest
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+ }
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+
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+ func loadRequest(_ request: URLRequest) {
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+ webView.load(request)
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+ }
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+
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+ ////////////////////////////////////////////////
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+ // View Lifecycle
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+
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+ override public func loadView() {
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+ view = webView
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+ loadRequest(request)
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+ }
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+
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+ override public func viewDidLoad() {
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+ super.viewDidLoad()
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+ updateToolbarItems()
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+ }
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+
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+ override public func viewWillAppear(_ animated: Bool) {
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+ assert(self.navigationController != nil, "SVWebViewController needs to be contained in a UINavigationController. If you are presenting SVWebViewController modally, use SVModalWebViewController instead.")
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+
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+ navBarTitle = UILabel()
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+ navBarTitle.backgroundColor = UIColor.clear
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+ if presentingViewController == nil {
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+ if let titleAttributes = navigationController!.navigationBar.titleTextAttributes {
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+ navBarTitle.textColor = titleAttributes["NSColor"] as! UIColor
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+ }
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+ }
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+ else {
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+ navBarTitle.textColor = self.titleColor
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+ }
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+ navBarTitle.shadowOffset = CGSize(width: 0, height: 1);
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+ navBarTitle.font = UIFont(name: "HelveticaNeue-Medium", size: 17.0)
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+
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+ navigationItem.titleView = navBarTitle;
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+
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+ super.viewWillAppear(true)
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+
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+ if (UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.phone) {
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+ self.navigationController?.setToolbarHidden(false, animated: false)
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+ }
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+ else if (UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad) {
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+ self.navigationController?.setToolbarHidden(true, animated: true)
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+ }
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+ }
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+
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+ override public func viewWillDisappear(_ animated: Bool) {
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+ super.viewWillDisappear(true)
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+
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+ if (UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.phone) {
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+ self.navigationController?.setToolbarHidden(true, animated: true)
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+ }
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+ }
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+
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+ override public func viewDidDisappear(_ animated: Bool) {
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+ super.viewDidDisappear(true)
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+ UIApplication.shared.isNetworkActivityIndicatorVisible = false
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+ }
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+
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+ ////////////////////////////////////////////////
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+ // Toolbar
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+
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+ func updateToolbarItems() {
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+ backBarButtonItem.isEnabled = webView.canGoBack
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+ forwardBarButtonItem.isEnabled = webView.canGoForward
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+
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+
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+ let refreshStopBarButtonItem: UIBarButtonItem = webView.isLoading ? stopBarButtonItem : refreshBarButtonItem
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+
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+ let fixedSpace: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.fixedSpace, target: nil, action: nil)
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+ let flexibleSpace: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
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+
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+ if (UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad) {
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+
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+ let toolbarWidth: CGFloat = 250.0
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+ fixedSpace.width = 35.0
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+
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+ let items: NSArray = [fixedSpace, refreshStopBarButtonItem, fixedSpace, backBarButtonItem, fixedSpace, forwardBarButtonItem, fixedSpace, actionBarButtonItem]
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+
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+ let toolbar: UIToolbar = UIToolbar(frame: CGRect(x: 0.0, y: 0.0, width: toolbarWidth, height: 44.0))
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+ if !closing {
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+ toolbar.items = items as? [UIBarButtonItem]
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+ if presentingViewController == nil {
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+ toolbar.barTintColor = navigationController!.navigationBar.barTintColor
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+ }
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+ else {
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+ toolbar.barStyle = navigationController!.navigationBar.barStyle
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+ }
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+ toolbar.tintColor = navigationController!.navigationBar.tintColor
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+ }
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+ navigationItem.rightBarButtonItems = items.reverseObjectEnumerator().allObjects as? [UIBarButtonItem]
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+
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+ }
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+ else {
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+ let items: NSArray = [fixedSpace, backBarButtonItem, flexibleSpace, forwardBarButtonItem, flexibleSpace, refreshStopBarButtonItem, flexibleSpace, actionBarButtonItem, fixedSpace]
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+
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+ if !closing {
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+ if presentingViewController == nil {
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+ navigationController!.toolbar.barTintColor = navigationController!.navigationBar.barTintColor
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+ }
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+ else {
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+ navigationController!.toolbar.barStyle = navigationController!.navigationBar.barStyle
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+ }
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+ navigationController!.toolbar.tintColor = navigationController!.navigationBar.tintColor
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+ toolbarItems = items as? [UIBarButtonItem]
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+ }
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+ }
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+ }
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+
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+
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+ ////////////////////////////////////////////////
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+ // Target Actions
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+
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+ func goBackTapped(_ sender: UIBarButtonItem) {
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+ webView.goBack()
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+ }
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+
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+ func goForwardTapped(_ sender: UIBarButtonItem) {
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+ webView.goForward()
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+ }
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+
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+ func reloadTapped(_ sender: UIBarButtonItem) {
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+ webView.reload()
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+ }
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+
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+ func stopTapped(_ sender: UIBarButtonItem) {
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+ webView.stopLoading()
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+ updateToolbarItems()
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+ }
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+
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+ func actionButtonTapped(_ sender: AnyObject) {
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+
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+ if let url: URL = ((webView.url != nil) ? webView.url : request.url) {
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+ let activities: NSArray = [SwiftWebVCActivitySafari(), SwiftWebVCActivityChrome()]
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+
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+ if url.absoluteString.hasPrefix("file:///") {
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+ let dc: UIDocumentInteractionController = UIDocumentInteractionController(url: url)
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+ dc.presentOptionsMenu(from: view.bounds, in: view, animated: true)
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+ }
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+ else {
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+ let activityController: UIActivityViewController = UIActivityViewController(activityItems: [url], applicationActivities: activities as? [UIActivity])
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+
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+ if floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_7_1 && UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad {
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+ let ctrl: UIPopoverPresentationController = activityController.popoverPresentationController!
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+ ctrl.sourceView = view
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+ ctrl.barButtonItem = sender as? UIBarButtonItem
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+ }
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+
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+ present(activityController, animated: true, completion: nil)
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+ }
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+ }
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+ }
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+
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+ ////////////////////////////////////////////////
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+
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+ func doneButtonTapped() {
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+ closing = true
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+ UINavigationBar.appearance().barStyle = storedStatusColor!
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+ self.dismiss(animated: true, completion: nil)
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+ }
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+
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+ // MARK: - Class Methods
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+
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+ /// Helper function to get image within SwiftWebVCResources bundle
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+ ///
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+ /// - parameter named: The name of the image in the SwiftWebVCResources bundle
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+ class func bundledImage(named: String) -> UIImage? {
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+ let image = UIImage(named: named)
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+ if image == nil {
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+ return UIImage(named: named, in: Bundle(for: SwiftWebVC.classForCoder()), compatibleWith: nil)
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+ } // Replace MyBasePodClass with yours
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+ return image
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+ }
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+
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+}
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+
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+extension SwiftWebVC: WKUIDelegate {
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+
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+ // Add any desired WKUIDelegate methods here: https://developer.apple.com/reference/webkit/wkuidelegate
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+
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+}
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+
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+extension SwiftWebVC: WKNavigationDelegate {
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+
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+ public func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
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+ self.delegate?.didStartLoading()
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+ UIApplication.shared.isNetworkActivityIndicatorVisible = true
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+ updateToolbarItems()
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+ }
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+
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+ public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
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+ self.delegate?.didFinishLoading(success: true)
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+ UIApplication.shared.isNetworkActivityIndicatorVisible = false
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+
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+ webView.evaluateJavaScript("document.title", completionHandler: {(response, error) in
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+ self.navBarTitle.text = response as! String?
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+ self.navBarTitle.sizeToFit()
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+ self.updateToolbarItems()
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+ })
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+
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+ }
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+
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+ public func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
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+ self.delegate?.didFinishLoading(success: false)
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+ UIApplication.shared.isNetworkActivityIndicatorVisible = false
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+ updateToolbarItems()
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+ }
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+
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+
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+}
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