ios - SIGVART 与单元 View 与标签

Question

我想知道为什么我在这段代码上收到 SIGBART 错误。我已经为每个图像和按钮分配了一个标签，但仍然收到错误。有谁知道为什么会这样？

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

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cat") as UITableViewCell!

    let image = cell?.viewWithTag(1) as! UIImageView //the error is here
    image.image = UIImage(named: "CatIcon")

    let button = cell?.viewWithTag(2) as! UIButton
    button.setTitle("Cat: \(CatView.catsnum[indexPath.row])", for: .normal)
    button.titleLabel?.font = UIFont(name: Font, size: 20)
    button.setTitleColor(.white, for: .normal)
    button.addTarget(self, action: #selector(CatLink), for: .touchUpInside)
    button.backgroundColor = .black
    button.backgroundColor?.withAlphaComponent(0.5)

    return cell!
}

Answer 1

您必须向单元格注册tableView

tableView.register(customClassName.self, forCellReuseIdentifier: "Cat")

或者用 xib 来实现

tableView.register(UINib(nibName: "customClassName", bundle: nil), forCellReuseIdentifier:"Cat")