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| import UIKit | |
| import SWRevealViewController | |
| class FrontViewController: UIViewController { | |
| /// overlay view | |
| lazy var overlayView : UIView = { | |
| let view = UIView() | |
| view.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.6) | |
| return view | |
| }() | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| view.backgroundColor = .lightGray | |
| setupView() | |
| setupNavBar() | |
| setupSWReveal() | |
| } | |
| /// adds overlay view | |
| func setupView(){ | |
| view.addSubview(overlayView) | |
| overlayView.translatesAutoresizingMaskIntoConstraints = false | |
| NSLayoutConstraint.activate([ | |
| overlayView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor), | |
| overlayView.leadingAnchor.constraint(equalTo: view.leadingAnchor), | |
| overlayView.trailingAnchor.constraint(equalTo: view.trailingAnchor), | |
| overlayView.bottomAnchor.constraint(equalTo: view.bottomAnchor) | |
| ]) | |
| overlayView.alpha = 0 | |
| } | |
| /// setup navigation bar | |
| func setupNavBar(){ | |
| navigationController?.navigationBar.isHidden = false | |
| navigationItem.leftBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "hamburger"), style: .plain, target: self, action: #selector(hamburgerClicked)) | |
| navigationController?.navigationBar.tintColor = .black | |
| navigationController?.navigationBar.barTintColor = UIColor.init(red: 255/255, green: 215/255, blue: 0, alpha: 1) | |
| navigationController?.navigationBar.isTranslucent = false | |
| } | |
| /// setup swreveal controller | |
| func setupSWReveal(){ | |
| //adding panGesture to reveal menu controller | |
| view.addGestureRecognizer((self.revealViewController()?.panGestureRecognizer())!) | |
| //adding tap gesture to hide menu controller | |
| view.addGestureRecognizer((self.revealViewController()?.tapGestureRecognizer())!) | |
| //setting reveal width of menu controller manually | |
| self.revealViewController()?.rearViewRevealWidth = UIScreen.main.bounds.width * (2/3) | |
| self.revealViewController()?.delegate = self | |
| } | |
| //MARK: - action | |
| @objc func hamburgerClicked(){ | |
| //toggle frontVC on clicking hamburger menu | |
| self.revealViewController()?.revealToggle(animated: true) | |
| } | |
| } | |
| //MARK: - SWRevealController delegates | |
| extension FrontViewController : SWRevealViewControllerDelegate{ | |
| //varying alpha of overlayView with progress of panGesture to reveal or hide menu view | |
| func revealController(_ revealController: SWRevealViewController!, panGestureMovedToLocation location: CGFloat, progress: CGFloat) { | |
| overlayView.alpha = progress | |
| } | |
| //animating alpha in case user just taps hamburger menu which directly change FrontViewPosition | |
| func revealController(_ revealController: SWRevealViewController!, animateTo position: FrontViewPosition) { | |
| //menu view is hidden | |
| if position == FrontViewPosition.left{ | |
| overlayView.alpha = 0 | |
| } | |
| //menu view is revealed | |
| if position == FrontViewPosition.right{ | |
| overlayView.alpha = 1 | |
| } | |
| } | |
| } |
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