如何将图像从 TableViewCell 传递到 UIImage

Question

My segues我想弄清楚是否有办法将我选择的单元格中的图像传递给一个完全不同的视图控制器中的新UIImageView。我不完全理解 segue 是如何工作的，经过数小时的审议，我还没有完全找到解决方案。我已经能够在tableview 中显示我的图像，但我想将所选图像发送到UIImageView 以获得更大的图片视图。我目前为此有 2 个 VC。其中第一个称为TableView

import UIKit

class TableView: UITableViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {


    @IBAction func toImage(_ sender: Any) {
        performSegue(withIdentifier: "ImageView", sender: self)
    }

    // Properties
    var imagesDirectoryPath:String!
    var images:[UIImage]!
    var titles:[String]!

    @IBAction func choosePhoto(_ sender: AnyObject) {
        let imagePicker = UIImagePickerController()
        if UIImagePickerController.isSourceTypeAvailable(.camera){
            imagePicker.sourceType = .photoLibrary
            print("Library selected")
        }else{
            print("No cam here!")
        }

        present(imagePicker, animated: true, completion: nil)
        imagePicker.delegate = self

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.delegate = self
        tableView.dataSource = self

        self.tableView!.register(UITableViewCell.self, forCellReuseIdentifier:"CellID")

        images = []

        let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
        // Get the Document directory path
        let documentDirectorPath:String = paths[0]
        // Create a new path for the new images folder
        imagesDirectoryPath = documentDirectorPath + "/ImagePicker"
        var objcBool:ObjCBool = true
        let isExist = FileManager.default.fileExists(atPath: imagesDirectoryPath, isDirectory: &objcBool)
        // If the folder with the given path doesn't exist already, create it
        if isExist == false{
            do{
                try FileManager.default.createDirectory(atPath: imagesDirectoryPath, withIntermediateDirectories: true, attributes: nil)
            }catch{
                print("Something went wrong while creating a new folder")
            }
        }
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func refreshTable(){
        do{
            images.removeAll()
            titles = try FileManager.default.contentsOfDirectory(atPath: imagesDirectoryPath)
            for image in titles{
                let data = FileManager.default.contents(atPath: imagesDirectoryPath + "/\(image)")
                let image = UIImage(data: data!)
                images.append(image!)
            }
            self.tableView.reloadData()
        }catch{
            print("Error")
        }
    }


    //MARK: UIImagePickerControllerDelegate Protocol
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

        // Save image to Document directory
        var imagePath = Date().description
        imagePath = imagePath.replacingOccurrences(of: " ", with: "")
        imagePath = imagesDirectoryPath + "/\(imagePath).png" //this would change depending on the name of the image
        let data = UIImagePNGRepresentation(image)
        _ = FileManager.default.createFile(atPath: imagePath, contents: data, attributes: nil)
        dismiss(animated: true) { () -> Void in
            self.refreshTable()
        }
    }

    //MARK: UITableView DataSource
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell:UITableViewCell! = tableView.dequeueReusableCell(withIdentifier: "CellID")

        cell?.imageView?.image = images[indexPath.row]
        cell.textLabel?.text = titles[indexPath.row]
        return cell
    }
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return images.count
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        performSegue(withIdentifier: "ImageView", sender: images[indexPath.row])
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        var secondVC : ImageView = segue.destination as! ImageView

        //secondVC.fullView = imagesDirectoryPath[IndexPath.row]
    }



}

这是我的ImageView，我希望我的单元格中的图像出现在这里。

import UIKit

class ImageView:ViewController{

    @IBOutlet var fullView: UIImageView!
    var selectedImage = UIImage()
    override func viewDidLoad() {
        super.viewDidLoad()
        self.fullView.image = self.selectedImage //Assign selected Image here




    }
    //segue via a button
    @IBAction func toTable(_ sender: Any) {
        performSegue(withIdentifier: "TableView", sender: self)

    }


}

那么有什么方法可以将现有图像传递给另一个 VC 中的 UIImageView。我梳理了整个谷歌，但我似乎无法弄清楚。

谢谢！

Answer 1

在您的故事板文件中，确保在 segue 目标的笔尖上将自定义类设置为 SecondViewController：