ios - 更新 CloudKit 记录，得到 "UITextField.text must be used from main thread only"

Question

因此，当我在 tableview 中选择我的记录进行编辑并保存时，只有当我选择不提供 “UITextField.text 必须仅从主线程使用”的记录时，它才会保存

这显示了错误，并且所有 3 个文本字段都使用了相同的所有 true。

有人知道吗？

@IBAction func saveButton(_ sender: Any) {

    let predi = NSPredicate(format: "Feil = %@", self.txtFeilF.text!)

    Animation.isHidden = false
    Animation.startAnimating()

    let query2 = CKQuery(recordType: "Feilrapporter", predicate: predi)

    publicDataBase2.perform(query2, inZoneWith: nil) { (results, error) in

        if error != nil {
            print("Error--->" + error.debugDescription)


        }else  {
            if (results?.count)! > 0 {

                let records = (results?[0])! as CKRecord

                records.setObject(self.txtNameF.text as CKRecordValue?, forKey: "RaportertAv")
                records.setObject(self.txtFeilF.text as CKRecordValue?, forKey: "Feil")
                records.setObject(self.txtFeilMsgF.text as CKRecordValue?, forKey: "Melding")

                self.publicDataBase2.save(records, completionHandler: { (result, error) in
                    if error != nil {
                        print("error--->" + error.debugDescription)
                    }else {
                        print("Endring Gjort")
                    }

                })
            }

            DispatchQueue.main.async(execute: {() -> Void in

                self.Animation.stopAnimating()
                self.Animation.isHidden = true
                self.save.isEnabled = false

                self.present(self.alertSaveEditData, animated: true, completion: nil)

                self.txtNameF.isHidden = true
                self.txtFeilF.isHidden = true
                self.txtFeilMsgF.isHidden = true

                self.txtFeilF.text = ""
                self.txtNameF.text = ""
                self.txtFeilMsgF.text = ""

                self.recFeil = ""
                self.recName = ""
                self.recMSG = ""
            })

        }
    }
}

Answer 1

发生的情况是您正在另一个无法工作的线程上访问 UITextField。所以在开始 perform 方法之前，您在变量中声明所有内容并在需要时使用它。

更改为:

@IBAction func saveButton(_ sender: Any) {

    let predi = NSPredicate(format: "Feil = %@", self.txtFeilF.text!)

    Animation.isHidden = false
    Animation.startAnimating()

    let query2 = CKQuery(recordType: "Feilrapporter", predicate: predi)

    let nameF = self.txtNameF.text as CKRecordValue?
    let feilF = self.txtFeilF.text as CKRecordValue?
    let feilMsgF = self.txtFeilMsgF.text as CKRecordValue?

    publicDataBase2.perform(query2, inZoneWith: nil) { (results, error) in

        if error != nil {
            print("Error--->" + error.debugDescription)


        }else  {
            if (results?.count)! > 0 {

                let records = (results?[0])! as CKRecord

                records.setObject(nameF, forKey: "RaportertAv")
                records.setObject(feilF, forKey: "Feil")
                records.setObject(feilMsgF, forKey: "Melding")

                self.publicDataBase2.save(records, completionHandler: { (result, error) in
                    if error != nil {
                        print("error--->" + error.debugDescription)
                    }else {
                        print("Endring Gjort")
                    }

                })
            }

            DispatchQueue.main.async(execute: {() -> Void in

                self.Animation.stopAnimating()
                self.Animation.isHidden = true
                self.save.isEnabled = false

                self.present(self.alertSaveEditData, animated: true, completion: nil)

                self.txtNameF.isHidden = true
                self.txtFeilF.isHidden = true
                self.txtFeilMsgF.isHidden = true

                self.txtFeilF.text = ""
                self.txtNameF.text = ""
                self.txtFeilMsgF.text = ""

                self.recFeil = ""
                self.recName = ""
                self.recMSG = ""
            })

        }
    }
}