Question

根据uigesturerecognizer的提示，我想要在我的表格视图单元格中的图像被完全屏蔽。

问题是我的didSelectRowAt func无法识别postedimage标识符。

使用未解析的标识符＆＃39; postedImage＆＃39;

如何解决此问题？

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

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FeedTableViewCell

    imageFiles[indexPath.row].getDataInBackground { (data, error) in

        if let imageData = data {

            if let downloadedImage = UIImage(data: imageData) {

                cell.postedImage.image = downloadedImage

            }

        }

    }

    cell.postedImage.image = UIImage(named: "test.png")

    return cell
}

func removeImage() {

    let imageView = (self.view.viewWithTag(100)! as! UIImageView)
    imageView.removeFromSuperview()
}

func addImageViewWithImage(image: UIImage) {

    let imageView = UIImageView(frame: self.view.frame)
    imageView.contentMode = .scaleAspectFit
    imageView.backgroundColor = UIColor.black
    imageView.image! = image
    imageView.tag = 100

    let dismissTap = UITapGestureRecognizer(target: self, action: #selector(self.removeImage))
    dismissTap.numberOfTapsRequired = 1
    imageView.addGestureRecognizer(dismissTap)
    self.view.addSubview(imageView)
}

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.addImageViewWithImage(image: postedImage[indexPath.row])
}

Answer 1

我认为您应首先检查并更改didSelect中的调用功能来自：

curl -i -X POST -H "Content-Type: application/json" -d 
"{\"username\":\"abc\",\"password\":\"123\"}" http://localhost:5000/api/users

到

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.addImageViewWithImage(image: postedImage[indexPath.row])
}

现在，您的 addImageViewWithImage 将接受来自单元格中包含的ImageView的图像。

Answer 2

Swift 3

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let cell = collectionView.cellForItem(at: indexPath) as! ImageSliderCollectionViewCell
    self.imageTapped(image: cell.problemImage.image!)
}

func imageTapped(image:UIImage){
    let newImageView = UIImageView(image: image)
    newImageView.frame = UIScreen.main.bounds
    newImageView.backgroundColor = .black
    newImageView.contentMode = .scaleAspectFit
    newImageView.isUserInteractionEnabled = true
    let tap = UITapGestureRecognizer(target: self, action: #selector(dismissFullscreenImage))
    newImageView.addGestureRecognizer(tap)
    self.view.addSubview(newImageView)
    self.navigationController?.isNavigationBarHidden = true
    self.tabBarController?.tabBar.isHidden = true
}

func dismissFullscreenImage(_ sender: UITapGestureRecognizer) {
    self.navigationController?.isNavigationBarHidden = false
    self.tabBarController?.tabBar.isHidden = false
    sender.view?.removeFromSuperview()
}

Answer 3

SWIFT 4 -已选择TableView单元格

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath) as! ProductTableViewCell
    self.imageTapped(image: cell.productImageView.image!)
}

func imageTapped(image:UIImage){
    let newImageView = UIImageView(image: image)
    newImageView.frame = UIScreen.main.bounds
    newImageView.backgroundColor = .black
    newImageView.contentMode = .scaleAspectFit
    newImageView.isUserInteractionEnabled = true
    let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.dismissFullscreenImage(_:)))
    newImageView.addGestureRecognizer(tap)
    self.view.addSubview(newImageView)
    self.navigationController?.isNavigationBarHidden = true
    self.tabBarController?.tabBar.isHidden = true
}

@objc func dismissFullscreenImage(_ sender: UITapGestureRecognizer) {
    self.navigationController?.isNavigationBarHidden = false
    self.tabBarController?.tabBar.isHidden = false
    sender.view?.removeFromSuperview()
}

Answer 4

问题是你没有使用数组。似乎postedImage是UIImageView。所以它不会起作用。你需要使用一个数组。

点击Swift时全屏显示tableviewcell内的图像

4 个答案: