如何在 Swift 中删除领域中的对象

Question

我检查了许多其他答案，但仍然无法从领域数据库中删除数据。这是我的错误代码：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Rebel.RebelTableViewController delete:]: unrecognized selector sent to instance 0x7fca7b40b5c0

此代码来自我的 table 要删除的视图：

if editingStyle == UITableViewCellEditingStyle.delete {
    rowHere = indexPath.row
    // it crashes the app when I want to delete from database

    //  delete(self.todos[self.rowHere!])

    self.Rebel.remove(at: indexPath.row)
    tableView.deleteRows(at: [indexPath as IndexPath], with: UITableViewRowAnimation.automatic)
}

Answer 1

首先在viewDidLoad()

中获取Object模型

var DatabaseModel: Results<ObjectClassRealm>!

override func viewDidLoad() {
    super.viewDidLoad()
    let realm = RealmService.shared.realm
    DatabaseModel = realm.objects(ObjectClassRealm.self)
}




func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) { 
    guard editingStyle == .delete else { return }
    let objectData = DatabaseModel[indexPath.row]
    RealmService.shared.delete(objectData)
}

或者您可以点击按钮删除

@IBAction func DeleteData(_ sender: Any) {
    let realm = try! Realm()
    let deleteData = realm.object(ofType: ObjectClassRealm.self, 
                                  forPrimaryKey: PRIMARYKEY)
    if deleteData == nil {
        print("No data in DB")
    } else {
        RealmService.shared.delete(deleteData!)
    }
}

阅读领域的文档，同样的问题你会发现很多解决方案。

如何在 Swift 中删除领域中的对象

How to delete object in realm in Swift

realm

ios

swift