swift - 通过tableview单元格中的按钮将图像导入imageview

Question

我想通过 tableviw 单元格中的按钮导入照片。因此特定表格视图单元格中的按钮将图像导入该特定单元格中的图像视图。因此，一个按钮将图像导入该特定单元格中的一个图像视图。我试图将照片导入代码放在 tableview 单元类中。代码未编译。

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
  
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = "\(indexPath.row)"
        return cell
    }
    var numberOfRows = 3
  
     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 118
    }
 
    var tableView = UITableView()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        setTableVIew()
     
    }
    
    func setTableVIew(){

        
        let VCframe = self.view.frame
        let height = VCframe.height * 0.8
        let widthx = VCframe.width
        
        
        tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)

        tableView.delegate = self
        tableView.dataSource = self
        self.view.addSubview(tableView)
        tableView.backgroundColor = .blue
        
        tableView.register(customtv.self, forCellReuseIdentifier: "cell")
    }


}
class customtv: UITableViewCell , UIImagePickerControllerDelegate, UINavigationControllerDelegate {
      var imagePicker: UIImagePickerController!

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

           // The info dictionary may contain multiple representations of the image. You want to use the original.
           guard let selectedImage = info[.originalImage] as? UIImage else {
               fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
           }

           // Set photoImageView to display the selected image.

           imageDisplayer.image = selectedImage

           // Dismiss the picker.
           dismiss(animated: true, completion: nil)
       }



       @objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
           if let error = error {
               // we got back an error!
               let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
               ac.addAction(UIAlertAction(title: "OK", style: .default))
               present(ac, animated: true)
           } else {
               let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
               ac.addAction(UIAlertAction(title: "OK", style: .default))
               present(ac, animated: true)
           }
       }
    
   lazy var backView : UIView = {
    let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
    view.backgroundColor = .green
    print(self.frame.width)
        return view
    }()
    
    lazy var press : UIButton = {
     let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
     press.backgroundColor = .systemOrange
        press.setTitle("import", for: .normal)
        press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
         return press
     }()
    
    lazy var imageDisplayer : UIImageView = {
     let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
     press.backgroundColor = .systemPink
         return press
     }()
    
    @objc func importPhoto(){
                    imagePicker =  UIImagePickerController()
                    imagePicker.delegate = self
                    imagePicker.sourceType = .photoLibrary
                    present(imagePicker, animated: true, completion: nil)

    }
    
    override func layoutSubviews() {
       backView.clipsToBounds = true

    }
    
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(animated, animated: true)
        addSubview(backView)
        backView.addSubview(press)
        backView.addSubview(imageDisplayer)
    }
   
    

}

 

标签： swiftuitableviewtableviewuiimagepickercontroller

Answer 1

您必须呈现UIImagePickerControllerinViewController而不是customtv.

在ViewController：

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    var numberOfRows = 3

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 118 }

    var tableView = UITableView()
    var selectedIndexPath = IndexPath(row: 0, section: 0)

    override func viewDidLoad() {
        super.viewDidLoad()

        setTableVIew()
    }

    func setTableVIew(){
        let VCframe = view.frame
        let height = VCframe.height * 0.8
        let widthx = VCframe.width

        tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)
        tableView.delegate = self
        tableView.dataSource = self
        view.addSubview(tableView)
        tableView.backgroundColor = .blue

        tableView.register(customtv.self, forCellReuseIdentifier: "cell")
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! customtv
        cell.textLabel?.text = "\(indexPath.row)"
        cell.press.tag = indexPath.row
        cell.press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
        return cell
    }

    @objc func importPhoto(_ button: UIButton) {
        selectedIndexPath = IndexPath(row: button.tag, section: 0)
        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .photoLibrary
        present(imagePicker, animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        guard let selectedImage = info[.originalImage] as? UIImage else {
            fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
        }
        guard let cell = tableView.cellForRow(at: selectedIndexPath) as? customtv else { return }
        cell.imageDisplayer.image = selectedImage
        tableView.reloadRows(at: [selectedIndexPath], with: .automatic)
        dismiss(animated: true, completion: nil)
    }

    @objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
        if let error = error {
            // we got back an error!
            let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
            ac.addAction(UIAlertAction(title: "OK", style: .default))
            present(ac, animated: true)
        } else {
            let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
            ac.addAction(UIAlertAction(title: "OK", style: .default))
            present(ac, animated: true)
        }
    }
}

在customtv：

class customtv: UITableViewCell {

    lazy var backView : UIView = {
        let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
        view.backgroundColor = .green
        print(self.frame.width)
        return view
    }()

    lazy var press : UIButton = {
        let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
        press.backgroundColor = .systemOrange
        press.setTitle("import", for: .normal)
        return press
    }()

    lazy var imageDisplayer : UIImageView = {
        let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
        press.backgroundColor = .systemPink
        return press
    }()

    override func layoutSubviews() {
        backView.clipsToBounds = true
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(animated, animated: true)
        addSubview(backView)
        backView.addSubview(press)
        backView.addSubview(imageDisplayer)
    }
}