This function below needs to instead go into an ObjC function
///this 1st func is in UITableViewController, the others are in UITableViewCell
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? ViewControllerTableViewCell {
...}
class ViewControllerTableViewCell: UITableViewCell, UIContextMenuInteractionDelegate
func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
UIContextMenuConfiguration(identifier: nil, previewProvider: {
if self.cc == interaction {
let image3 = UIImage(named:"ringy.png")
if let unwrappedImage1 = image3 {
return ImagePreviewController(image:unwrappedImage1)
}
else {
return nil
}
}
else if self.vv == interaction{
let image3 = UIImage(named:"green.png")
if let unwrappedImage1 = image3 {
return ImagePreviewController(image:unwrappedImage1)
}
else {
return nil
}
}
else {
return nil
}
})
}
Now Obj C function
@objc func didLongPress() {
///database call
if ab as! Int>0 {
/// here the part for ringy.png needs to go
} else {
/////here the part for green.png needs to go
}
}
else {
print("No data available")
}
})
}
ObjC gets handle in override function
let longPress = UILongPressGestureRecognizer(target: self, action: #selector(didLongPress))
like?.addGestureRecognizer(longPress)
What error am I currently getting:
Non void in void function. That is if I take the ringy/image3 and green/image3 part of the code and put it is the objC function.
Update after first answer
I seem to get it working with the answer and some modifications
weak var viewController: UIViewController?
viewController?.present(previewVC, animated: true, completion: nil)
cell.viewController = self ///inside cellForRowAt
Only issue I have left is that the dimension of the ImagePreviewController are wrong/virtually full screen. They should be:
class ImagePreviewController: UIViewController {
private let imageView = UIImageView()
init(image: UIImage) {
super.init(nibName: nil, bundle: nil)
imageView.contentMode = .scaleAspectFill
imageView.clipsToBounds = true
imageView.image = image
view = imageView
let size = UIScreen.main.bounds.size
preferredContentSize = .init(width: size.width, height: size.height/1.55)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
If you want to present a new view controller, you could either perform a segue (if you work with storyboards) or do it the classic way:
@objc func didLongPress() {
var image:UIImage?
// Some database call? How to get "ab"?
// Maybe you should not use as! in the following check:
if ab as! Int>0 {
image = UIImage(named:"ringy.png")
} else {
image = UIImage(named:"green.png")
}
if let image = image {
let previewVC = ImagePreviewController(image:image)
self.present(previewVC, animated: true, completion: nil)
} else {
print("No data available")
}
}