tableview 单元格中的 Swift 按钮回调不起作用

Question

I want to have a UIButton inside my TableViewCell and I tried it with a closure but it is not doing anything:

Cell :

let favouriteButton: UIButton = {
    let v = UIButton()
    v.setImage(UIImage(systemName: "star"), for: .normal)
    v.setImageTintColor(.darkCustom)
    v.addTarget(self, action: #selector(favouriteButtonTapped), for: .touchUpInside)
    v.imageView?.contentMode = .scaleAspectFit
    v.contentHorizontalAlignment = .fill
    v.contentVerticalAlignment = .fill
    v.translatesAutoresizingMaskIntoConstraints = false
    return v
}()

var favouriteButtonTappedCallback: (() -> ())?

@objc func favouriteButtonTapped() {
    self.favouriteButtonTappedCallback?()
}

CellForRowAt:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: SearchBarCell.reuseID) as! SearchBarCell
    
    cell.favouriteButtonTappedCallback = {
        print("tapped")
    }
    return cell
}

What am I missing here?

Answer 1

I found the issue.. I called self.addSubView(favouriteButton so the contentView actually covered the button. Simply fixed it by calling this:

contentView.addSubview(favouriteButton)

Thanks for all the help!

Answer 2

typealias FavouriteButtonTappedCallback = () -> Void   
var favouriteButtonTappedCallBack = FavouriteButtonTappedCallBack?


 if let tappedClosure = self.favouriteButtonTappedCallback {
            tappedClosure()
        }

and

cell.favouriteButtonTappedCallBack

Answer 3

检查所有视图层次结构并为所有用户启用用户交互，这可能是主要的嫌疑人。