ios - 像刷新一样重新加载 tableview View

Question

我正在用 json 数据填充 tableview 并且它的工作成功但现在我想在刷新按钮上更新 tableview 单击刷新按钮我再次调用我创建的现有 func 调用 api 让我告诉你我的代码

代码

func OverdueList(){
    let preferences = UserDefaults.standard
    let uid = "u_id"
    let acTkn = "acc_tkn"

    let u_ID = preferences.object(forKey: uid)
    let A_Token = preferences.object(forKey: acTkn)

    let params = ["user_id": u_ID!, "access_token": A_Token!]
    print(params)
    SVProgressHUD.show()
    Alamofire.request(inspectionsList, method: .post, parameters: params).responseJSON(completionHandler: {(response) in
        switch response.result{
        case.success(let value):
            let json  = JSON(value)
            print(json)
            let data = json["inspections_overdue_data"]
            print(data)
            if data == []{
                self.viewNodata.isHidden = false
            }else{
                data.array?.forEach({ (iunOverDue) in
                    let iOveList = OvedueModel(surveyor_id: iunOverDue["surveyor_id"].stringValue, country: iunOverDue["country"].stringValue, time: iunOverDue["time"].stringValue, address2: iunOverDue["address2"].stringValue, address3: iunOverDue["address3"].stringValue, notes: iunOverDue["notes"].stringValue, house_num: iunOverDue["house_num"].stringValue, name: iunOverDue["name"].stringValue, address1: iunOverDue["address1"].stringValue, latitude: iunOverDue["latitude"].stringValue, eircode: iunOverDue["eircode"].stringValue, date_inspected: iunOverDue["date_inspected"].stringValue, property_id: iunOverDue["property_id"].stringValue, county: iunOverDue["county"].stringValue, client_id: iunOverDue["client_id"].stringValue, longitude: iunOverDue["longitude"].stringValue)
                    self.searchResult = self.overDueData
                    self.overDueData.append(iOveList)
                })

                self.tblOvedue.reloadData()
            }
            SVProgressHUD.dismiss()
        case.failure(let error):
            print(error.localizedDescription)
        }

    })
}

我正在调用这个函数来填充表格 View ，我正在这样做

@IBAction func btnRefreshTapped(_ sender: UIButton) {
      OverdueList()
    }

问题是，在重新调用这个函数数据后，一遍又一遍重复，我该如何解决这个问题？

Answer 1

请试试这段代码:

func OverdueList(){


    let preferences = UserDefaults.standard
    let uid = "u_id"
    let acTkn = "acc_tkn"

    let u_ID = preferences.object(forKey: uid)
    let A_Token = preferences.object(forKey: acTkn)

    let params = ["user_id": u_ID!, "access_token": A_Token!]
    print(params)
    SVProgressHUD.show()
    Alamofire.request(inspectionsList, method: .post, parameters: params).responseJSON(completionHandler: {(response) in
        switch response.result{
        case.success(let value):
            self.overDueData.removeAll()
            let json  = JSON(value)
            print(json)
            let data = json["inspections_overdue_data"]
            print(data)
            if data == []{
                self.viewNodata.isHidden = false
            }else{
                data.array?.forEach({ (iunOverDue) in
                    let iOveList = OvedueModel(surveyor_id: iunOverDue["surveyor_id"].stringValue, country: iunOverDue["country"].stringValue, time: iunOverDue["time"].stringValue, address2: iunOverDue["address2"].stringValue, address3: iunOverDue["address3"].stringValue, notes: iunOverDue["notes"].stringValue, house_num: iunOverDue["house_num"].stringValue, name: iunOverDue["name"].stringValue, address1: iunOverDue["address1"].stringValue, latitude: iunOverDue["latitude"].stringValue, eircode: iunOverDue["eircode"].stringValue, date_inspected: iunOverDue["date_inspected"].stringValue, property_id: iunOverDue["property_id"].stringValue, county: iunOverDue["county"].stringValue, client_id: iunOverDue["client_id"].stringValue, longitude: iunOverDue["longitude"].stringValue)
                    self.searchResult = self.overDueData
                    self.overDueData.append(iOveList)
                })

                self.tblOvedue.reloadData()
            }
            SVProgressHUD.dismiss()
        case.failure(let error):
            print(error.localizedDescription)
        }

    })
}

可能对你有帮助谢谢。