按升序（从下到上）删除tableView行时，正在删除所选行上方的不正确行。例如，使用以下四行：
A B C D
当向左滑动删除D行时，正在删除C行。
相反，当按降序（从上到下）删除时，没有任何问题，行是按正确的顺序删除的。基本删除代码的后面是具有两个部分的tableView（在两个部分中按升序删除时会出现问题）。任何建议，非常感谢！
let deleteAction = UIContextualAction(style: .destructive, title: NSLocalizedString("Delete", comment:"Delete")) { _, _, complete in
let section = indexPath.section
let row = indexPath.row
let i = IndexPath(item: row, section: section)
if section == 0 {
self.cyclesteps.remove(at: row)
self.tableView.deleteRows(at: [i], with: .automatic)
let thesample = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.distanceCycling)
let thepredicate = HKQuery.predicateForObjects(from: HKSource.default())
healthStore.deleteSamplesOfType(thesample!, predicate: thepredicate, withCompletion: { (success, count, error) -> Void in
DispatchQueue.main.async(execute: { () -> Void in
if error == nil
{
// saved successfully
//self.tableView.reloadRows(at: [i], with: .automatic)
}
else
{
print("Error occured while saving to Health Kit: \(error!.localizedDescription)")
}
})
})
}
强烈建议首先删除数据库中的项，然后删除数据源中的项（如果成功），然后更新视图
let deleteAction = UIContextualAction(style: .destructive, title: NSLocalizedString("Delete", comment:"Delete")) { _, _, complete in
guard indexPath.section == 0 else { complete(false) }
let thesample = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.distanceCycling)
let thepredicate = HKQuery.predicateForObjects(from: HKSource.default())
healthStore.deleteSamplesOfType(thesample!, predicate: thepredicate, withCompletion: { (success, count, error) -> Void in
DispatchQueue.main.async {
if let error = error {
print("Error occured while saving to Health Kit: \(error.localizedDescription)")
complete(false)
} else {
// saved successfully
self.cyclesteps.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .automatic)
complete(true)
}
}
})
}
并且不要忘记调用该操作的complete处理程序。
