Tag: ios

I want to make it so that when a user swipes up, that is picked up and the user moves on to the next DetailView.

DetailViewController.swift is currently

class DetailViewController: UIViewController {
    @IBOutlet var imageView: UIImageView!
    var selectedImage: String?
    
    
  
    //What will print or happen when each gesture happens
    @objc public func handleGesture(gesture: UISwipeGestureRecognizer) -> Void {
        if gesture.direction == UISwipeGestureRecognizer.Direction.right {
            print("Swipe Right")
        }
        else if gesture.direction == UISwipeGestureRecognizer.Direction.left {
            print("Swipe Left")
        }
        else if gesture.direction == UISwipeGestureRecognizer.Direction.up {
//            print("Swipe Up")
      // FOR WHEN USER SWIPES US WHICH I WANT
            
        }
        else if gesture.direction == UISwipeGestureRecognizer.Direction.down {
            print("Swipe Down")
        }
    }

    
    
    override func viewDidLoad() {
        
        super.viewDidLoad()
        
        
      
     
        
        
        //GESTURES
        
        let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
           swipeLeft.direction = .left
           self.view!.addGestureRecognizer(swipeLeft)

           let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
           swipeRight.direction = .right
           self.view!.addGestureRecognizer(swipeRight)

           let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
           swipeUp.direction = .up
           self.view!.addGestureRecognizer(swipeUp)

           let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
           swipeDown.direction = .down
           self.view!.addGestureRecognizer(swipeDown)
        
        
        
        let backgroundImage = UIImageView(frame: UIScreen.main.bounds)
            backgroundImage.image = UIImage(named: "janbg.jpg")
//        backgroundImage.contentMode = UIView.ContentMode.scaleAspectfill
        backgroundImage.contentMode = UIImageView.ContentMode.scaleAspectFill
            self.view.insertSubview(backgroundImage, at: 0)
        
//   title = selectedImage //no need to unwrap since both are optional string. title optional as nil by default. ViewControllers have no title, thus no text in navigation bar
        title = (selectedImage! as NSString).deletingPathExtension
        navigationItem.largeTitleDisplayMode = .never
        // Do any additional setup after loading the view.
        if let imageToLoad = selectedImage {
            imageView.image = UIImage(named: "(Bundle.main.resourcePath!)/Images" + "/" + imageToLoad)
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.hidesBarsOnTap = true
        let nav = self.navigationController?.navigationBar
        nav?.titleTextAttributes = (NSAttributedString.Key.foregroundColor: UIColor.white)
        self.navigationController?.isNavigationBarHidden = false
    }
   
    
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        navigationController?.hidesBarsOnTap = false
    }
   

}

My ViewController.swift file is

import Lottie

public class ViewController: UITableViewController {
    var pictures = (String)()
    
    
    public override func viewDidLoad() {
        super.viewDidLoad()
        
        
        // Do any additional setup after loading the view.
        

//        self.navigationItem.title = "Your Title"
//        navigationController?.navigationBar.prefersLargeTitles = true
//        navigationController?.navigationBar.largeTitleTextAttributes = (NSAttributedString.Key.foregroundColor: UIColor.blue)
        
        self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
        self.navigationController?.navigationBar.shadowImage = UIImage()
        self.navigationController?.navigationBar.isTranslucent = true
        self.navigationController?.view.backgroundColor = UIColor.clear
        self.navigationController?.navigationBar.barTintColor = UIColor.clear
        
        
        let label = UILabel()
        label.text = "Sample"
        label.textAlignment = .center
        navigationItem.titleView = label
        label.backgroundColor = UIColor.clear
        

       
        label.textColor = UIColor.red
        label.font = UIFont(name: "ZillaSlab-Bold", size: 30.0)
        label.translatesAutoresizingMaskIntoConstraints = false
        label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .centerX, relatedBy: .equal, toItem: label.superview, attribute: .centerX, multiplier: 1, constant: 0))
        label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .width, relatedBy: .equal, toItem: label.superview, attribute: .width, multiplier: 1, constant: 0))
        label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .centerY, relatedBy: .equal, toItem: label.superview, attribute: .centerY, multiplier: 1, constant: 0))
        label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .height, relatedBy: .equal, toItem: label.superview, attribute: .height, multiplier: 1, constant: 0))

        tableView.backgroundView = UIImageView(image: UIImage(named: "lun2.jpeg"))

        let fm = FileManager.default
//        let path = Bundle.main.resourcePath!
        let path = "(Bundle.main.resourcePath!)/Images"
        let items = try! fm.contentsOfDirectory(atPath: path)

        for item in items {
            
                // this is a a picture to load
                pictures.append(item)
              
            }
        
      
        print(pictures)
    }

    // the code below changing a behaviour from parent class - number of rows in section
    public override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return pictures.count
    }
    
//    override func viewWillAppear(_ animated: Bool) {
//        self.navigationController?.isNavigationBarHidden = true
//
    // }

    public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Picture", for: indexPath)
//      cell.textLabel?.text = pictures(indexPath.row)
        cell.textLabel?.text = (pictures(indexPath.row) as NSString).deletingPathExtension
        cell.textLabel?.font = UIFont.systemFont(ofSize: 20, weight: UIFont.Weight.heavy)
        cell.textLabel?.font = UIFont(name: "ZillaSlab-Bold", size: 23)
        cell.textLabel?.textAlignment = .center // center aligns text

        cell.textLabel?.textColor = UIColor.black
        let backgroundView = UIView()
        backgroundView.backgroundColor = UIColor.white
        cell.selectedBackgroundView = backgroundView
        return cell
    }
    


    public override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
        self.navigationController?.navigationBar.shadowImage = UIImage()
        self.navigationController?.navigationBar.isTranslucent = true
        self.navigationController?.navigationBar.barTintColor = UIColor.clear
        self.navigationController?.navigationBar.backgroundColor = UIColor.clear
    }

    public override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)

        self.navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
        self.navigationController?.navigationBar.shadowImage = nil
        self.navigationController?.navigationBar.isTranslucent = true
    }
    public override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController {
            vc.selectedImage = pictures(indexPath.row) // selectedImage can be nil or be a string
//           var nextImageIndex = indexPath.row + 1
//            print(type(of: nextImageIndex))
            navigationController?.pushViewController(vc, animated: true)
        }
    }
}

What should I include inside else if gesture.direction == UISwipeGestureRecognizer.Direction.up and how do I make it execute to move to the next DetailViewer which is pictures(indexPath.row + 1) , pictures is the array in the ViewController.swift file ?