我添加了leadingSwipeAction “編輯”按鈕。但是，當我在模擬器中按下“編輯”按鈕時，應用程式崩潰并在 **prepare(for:sender:)** 方法中顯示“執行緒 1：信號 SIGBART”。
我看到了類似的問題，但他們的解決方案沒有幫助。我是新手，不明白問題出在哪里。
`//my edit button code`
override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let edit = UIContextualAction(style: .normal, title: "Edit") { [self] (contextualAction, view, actionPrformed: (Bool) -> Void) in
//TODO:
performSegue(withIdentifier: "EditItem", sender: self)
actionPrformed(true)
}
return UISwipeActionsConfiguration(actions: [edit])
}
// segue
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "AddItem" {
let controller = segue.destination as! AddAndEditItemViewController
controller.delegate = self
}
else if segue.identifier == "EditItem" {
let controller = segue.destination as! AddAndEditItemViewController
controller.delegate = self
if let indexPath = tableView.indexPath(
for: sender as! UITableViewCell) { //erorr shows here
controller.itemToEdit = items[indexPath.row]
}
}
}
uj5u.com熱心網友回復：
self這里
performSegue(withIdentifier: "EditItem", sender: self)
是 vc 實體本身而不是單元格，您需要傳遞 indexPath.row
performSegue(withIdentifier: "EditItem", sender: indexPath.row)
然后
let index = sender as! Int
controller.itemToEdit = items[index]
你也可以使用
guard let index = tableView.indexPathForSelectedRow?.row else { return }
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