The problem is like the title. Here is my code. And I find the operation, swipe from the right to left to delete directly, is new feature in iOS11
let model = self.customRules.remove(at: indexPath.row) //delete datasource
self.dao.delete(model: model) //delete data in database
tableView.beginUpdates() //still crash no matter the line exists or not
tableView.deleteRows(at: [indexPath], with: .left) //delete cell view
tableView.endUpdates()
This is the crash log.
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView internal inconsistency: the _swipedIndexPath cannot be nil if the swipe to delete row is being deleted in _updateRowsAtIndexPaths:withUpdateAction:rowAnimation:usingPresentationValues:'
Last Exception Backtrace:
0 CoreFoundation 0x000000018710fd50 <redacted> + 148
1 libobjc.A.dylib 0x0000000186624528 objc_exception_throw + 56
2 CoreFoundation 0x000000018710fc0c <redacted> + 0
3 Foundation 0x0000000187a9bb44 <redacted> + 112
4 UIKit 0x00000001907c52b8 <redacted> + 648
5 UIKit 0x00000001906819e4 <redacted> + 140
......
Your code seems to be OK, but there has been a bug in Xcode 9 with the deletion of cells. If you try your code in Xcode 8 it will probably work. Checkout this answer for more information.
Try to use my example.
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var data = ["Byba", "Boba", "Gent", "Xpa", "zc", "123", "swipe", "gen", "sw", "xcas", "kjs", "908"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
// MARK: - UITableViewDelegate
extension ViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, titleForDeleteConfirmationButtonForRowAt indexPath: IndexPath) -> String? {
return "delete"
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
tableView.beginUpdates()
data.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .left)
tableView.endUpdates()
}
}
}
// MARK: - UITableViewDataSource
extension ViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
let item = data[indexPath.row]
cell.textLabel?.text = item
return cell
}
}
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