Question

我在视图中有一个条目列表。该视图顶部还有一个搜索栏。进行搜索时，搜索结果会正确显示。现在显示搜索结果后，我删除其中一个条目。这也很好。但是，当我开始删除在搜索字段中输入的搜索字符时，只显示删除和编辑图标的虚拟字段（与删除的条目相关），如此显示...

此处删除的记录仍然显示为空，但根本不应显示。

这是我在搜索栏textDidChange中编写的代码......

    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        if searchText != "" {
            charInSearchBar = true

            //filter the results
            searchActive = true

            filtered = self.allCategories.filter({( data : CategoryItems) -> Bool in

                if let sdf = data.category {
                     return (sdf.lowercased().contains(searchText.lowercased()))
                }

               return false
            })

            if(filtered.count == 0){
                noSearchChar1 = true 
                noSearchChar = true

            } else {
                searchActive = true
            }
            tableview.reloadData()
        } 

else {  

            noSearchChar1 = false
            searchActive = false
            self.tableview.reloadData()

        }
    }

编辑1

这是删除行的方法......

    func deleteTapped(cell: ProductCategoryTableViewCell) {
        if let indexPath = tableview?.indexPath(for: cell) {

            if (searchActive) {

                deleteBtnTapped = true
                let alertController = UIAlertController(title: "Alert", message: "Delete this Category?", preferredStyle: UIAlertControllerStyle.alert)


                let yesAction = UIAlertAction(title: "Yes", style: UIAlertActionStyle.default) { (result : UIAlertAction) -> Void in
                    let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
                    context.delete(self.filtered[indexPath.row] as NSManagedObject)
                    self.filtered.remove(at: indexPath.row)
                    // try context.save()
                    do {
                        try context.save()
                        print("saved!")
                    } catch let error as NSError  {
                        print("Could not save \(error), \(error.userInfo)")
                    }

                    self.tableview.deleteRows(at: [indexPath], with: .fade)
                    self.tableview.reloadData()
                     self.deleteBtnTapped = false


                }
       }
}

Answer 1

您不仅要从filtered删除该项目，还要从self.allCategories删除该项目。

context.delete(self.filtered[indexPath.row] as NSManagedObject)

// here remove it from allCategories as well
if let indexInAllCategories = self.allCategories.index(of: self.filtered[indexPath.row]) {
    self.allCategories.remove(at: indexInAllCategories)
}

self.filtered.remove(at: indexPath.row)

执行搜索后删除会产生一个虚拟行

1 个答案: