UIMenuController in a TableViewCell Element - swift

Question

I am looking to get a UIMenuController when an image within a cell is tapped. To be clear this is NOT when the cell is tapped, but rather when the image within the cell is tapped. The tap gesture on the image is firing off properly and running the function, but the menu never shows.
Custom Cell:
class VideoHomeCell: UITableViewCell {
var thumbImage:UIImage! {
didSet {
createCell()
}
}
private lazy var thumbImageView:UIImageView = {
let view = UIImageView(image: self.thumbImage)
view.contentMode = .scaleAspectFill
view.clipsToBounds = true
view.isUserInteractionEnabled = true
view.translatesAutoresizingMaskIntoConstraints = false
let gesture = UITapGestureRecognizer(target: self, action: #selector(imageTapped))
view.addGestureRecognizer(gesture)
return view
}()
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func createCell() {
self.addSubview(thumbImageView)
thumbImageView.heightAnchor.constraint(equalToConstant: 100).isActive = true
thumbImageView.widthAnchor.constraint(equalToConstant: 100).isActive = true
thumbImageView.leadingAnchor.constraint(equalTo: self.leadingAnchor).isActive = true
thumbImageView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
}
#objc func imageTapped(recognizer: UIGestureRecognizer) {
let menuController = UIMenuController.shared
let trimItem = UIMenuItem(title: "Trim", action: #selector(menuSelected))
menuController.menuItems = [trimItem]
menuController.setTargetRect(self.thumbImageView.frame, in: self.superview!)
menuController.setMenuVisible(true, animated: true)
}
#objc func menuSelected() {
print("Menu Selection!")
}
}
TableView:
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.videoModelArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! VideoHomeCell
cell.thumbImage = self.videoModelArray[indexPath.row].originalThumbnail
return cell
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100.0
}
I have tried different values within setTargetRect to include the gesture's view and self.frame. I have also tried rendering in self. Additionally, I manually set a CGRect. Nothing I do allows for the menu to display.

Answer 1

I solved this issue by creating a protocol within the cell subclass and I assigned the table view controller as the delegate. When the image is tapped it fires off the delegate and then the UIMenuController is created within the tableview rather than within the tableviewcell. I pass back the cell and I am then able to use it's view to show the menu. It is also required to have the following on the tableview per Leo Dabus' comment.
override var canBecomeFirstResponder: Bool {
return true
}
In the end I while I was not able to make this work inside the tableviewcell subclass, I do find this an acceptable workaround.