将图像从 tableViewcell（Xib 文件）传递给另一个 ViewController

Posted 2023-02-24

【中文标题】将图像从 tableViewcell（Xib 文件）传递给另一个 ViewController

【英文标题】：Passing Image to another ViewController from a tableViewcell (Xib file)

【发布时间】：2019-05-13 16:03:14

【问题描述】：

screenShot of the tableView cell with 3 images

我已使用 xib 文件生成 tableview 单元格。在 tableViewcell 类中，我正在传递 1/2/3/更多图像以显示像 facebook 这样的图像。现在，当我点击 tableviewcell 的 imageView（可以是 1/2/3）时，我希望它全屏显示图片。我在图像视图中添加了 tabguest 识别器。但我无法将图像传递给第二个 ViewController。有什么帮助吗？

cellForRowAt 索引路径代码：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 

        let cell = tableView.dequeueReusableCell(withIdentifier: "mycell", for: indexPath) as! MyCell
        cell.delegate = self
        cell.index =  indexPath.row

        cell.cellConfig(withText: text , withImage: (photo3 as? [UIImage]))
        cell.isExpanded = false

        let tapToNavigate =  UITapGestureRecognizer(target: self, action: #selector(handleDetailsPicture))
        let tapToNavigate2 = UITapGestureRecognizer(target: self, action: #selector(handleDetailsPicture))
        let tapToNavigate3 = UITapGestureRecognizer(target: self, action: #selector(handleDetailsPicture))


        tapToNavigate.numberOfTapsRequired = 1

        cell.photoView1.isUserInteractionEnabled = true
        cell.photoView2.isUserInteractionEnabled = true
        cell.photoView3.isUserInteractionEnabled = true

        cell.photoView1.addGestureRecognizer(tapToNavigate)
        cell.photoView2.addGestureRecognizer(tapToNavigate2)
        cell.photoView3.addGestureRecognizer(tapToNavigate3)


        return cell
    

tapguest 识别器处理程序代码：

    @objc func handleDetailsPicture() 

        let secondViewController = self.storyboard!.instantiateViewController(withIdentifier: "DetailsPictureViewController") as! DetailsPictureViewController
        self.navigationController!.pushViewController(secondViewController, animated: true)

   

细胞类功能代码：

func cellConfig(withText text:String? , withImage Image: [UIImage]?) 


        self.seeMoreInPicture.isHidden = true

        photoView1.contentMode = .scaleAspectFill
        photoView2.contentMode = .scaleAspectFill
        photoView3.contentMode = .scaleAspectFill

        photoView1.clipsToBounds = true
        photoView2.clipsToBounds = true
        photoView3.clipsToBounds = true


        if text == nil 
            self.textViewHeightCOnstrain.constant = 0
            self.bottomSpaceBetSeemoreAndContainer.constant = 0
            self.imageContainerViewHeight.constant = contentView.frame.height

        

        if text != nil && isExpanded == false 

            let width = UIScreen.main.bounds.size.width

            if text!.heightWithConstrainedWidth(width: width, font:  UIFont.systemFont(ofSize: 14)) > 100 
                self.textViewHeightCOnstrain.constant = 100
                self.seeMoreButton.isHidden = false
            

            else if text!.heightWithConstrainedWidth(width: width, font:  UIFont.systemFont(ofSize: 14)) < 100 
                self.textViewHeightCOnstrain.constant = text!.heightWithConstrainedWidth(width: width, font:  UIFont.systemFont(ofSize: 14))
                self.seeMoreButton.isHidden = true
            
            self.textView.text = text
        


       self.textView.text = text

        if Image == nil 
            let width = UIScreen.main.bounds.size.width
            self.textViewHeightCOnstrain.constant = (text?.heightWithConstrainedWidth(width: width, font: UIFont.systemFont(ofSize: 14)))!
            self.imageContainerViewHeight.constant = 0
            self.photoView2Height.constant = 0
            self.photoView3Height.constant = 0
            self.bottomSpaceBetSeemoreAndContainer.constant = 0
        


        else if Image?.count == 1 
            self.imageContainerView1Width.constant = UIScreen.main.bounds.size.width
            self.trailingBetweenContainers.constant = 0
            self.photoView1.image = Image![0]

        

        else if Image?.count == 2 
            self.photoView3Height.constant = 0
            self.photoView2Height.constant = imageContainerViewHeight.constant
            self.photoView1.image = Image![0]
            self.photoView2.image = Image![1]

        

        else if Image?.count == 3 
            self.photoView1.image = Image![0]
            self.photoView2.image = Image![1]
            self.photoView3.image = Image![2]

        

        else 
            self.photoView1.image = Image![0]
            self.photoView2.image = Image![1]
            self.photoView3.image = Image![2]

            self.seeMoreInPicture.isHidden = false

        
    

secondViewCONtroller 代码：

class DetailsPictureViewController: UIViewController 

    @IBOutlet weak var detailsImage: UIImageView!

    var imageToShow = UIImage()

    override func viewDidLoad() 
        super.viewDidLoad()

       self.detailsImage.image = imageToShow

    

【问题讨论】：

不要使用点击手势。使用在您选择/点击单元格时调用的表委托方法 didSelectRow。

需要添加手势，因为我已经在使用 didselectRow 方法来查看 textField 的更多行为。

【参考方案1】：

我认为您没有向 secondVC 传递任何信息

class DetailsPictureViewController: UIViewController 

    @IBOutlet weak var detailsImage: UIImageView!

    var imageToShow = UIImage()

    override func viewDidLoad() 
        super.viewDidLoad()

       self.detailsImage.image = imageToShow

    

此代码不会设置或告诉应用执行任何操作

self.detailsImage.image = imageToShow

告诉应用在prepareForSegue准备好并设置图像时该做什么

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) 

        if segue.identifier == "DetailsPictureViewController" 
            let destination = segue.destinationViewController as! DetailsPictureViewController
            destination.imageToShow = photoView1.image //example
        
    

然后在你的 secondViewCOntroller

@IBOutlet weak var detailsImage: UIImageView!
var imageToShow : UIImage?

在 viewDidLoad 中

postingImage.image = imageToShow