如何在 iOS Swift 中使用段控制从模型中过滤名称、日期？

Posted 2023-03-03

【中文标题】如何在 iOS Swift 中使用段控制从模型中过滤名称、日期？

【英文标题】：How to filter name, date from model using segment control in iOS Swift?

【发布时间】：2019-08-28 11:16:41

【问题描述】：

我尝试从段控制中过滤数据。我有五个部分，即“全部”、“请求”、“申请者”、“总价值”、“日期”。我尝试使用

过滤值

searchedData.sorted(by:  $0.req! > $1.req! )

但不工作。

这是我的静态数组：

  var sampleData = [RequisitionModel(req: "123", requisitioner: "eqqw", totalValue: "4123", dateCreated: "05/7/2022"),
RequisitionModel(req: "1234", requisitioner: "seqw", totalValue: "0123", dateCreated: "20/8/2022"),
RequisitionModel(req: "134", requisitioner: "efqw", totalValue: "56123", dateCreated: "10/5/2022"),
RequisitionModel(req: "3634", requisitioner: "eqw", totalValue: "6123", dateCreated: "20/9/2022"),
RequisitionModel(req: "22234", requisitioner: "deqw", totalValue: "123", dateCreated: "20/10/2022")]

这是我的段控制功能：

     @IBAction func segmentedControlAction(sender: AnyObject) 

    switch segmentFilter.selectedSegmentIndex 

    case 0:
        print("All")
        dataFilter = 0
    case 1:
        print("Req No")
        dataFilter = 1
    case 2:
        print("Requisitioner")
        dataFilter = 2
    case 3:
        print("Total Value")
        dataFilter = 3
    case 4:
        print("Date Created")
        dataFilter = 4

    default:
        print("All")
        dataFilter = 0
    
    reload()



func reload() 

    DispatchQueue.main.async 

        self.tableView.reloadData()

    

这是我的 tableview 函数，我正在尝试过滤数据：

   func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 

    let cell = tableView.dequeueReusableCell(withIdentifier: "prCell", for: indexPath) as! PrListCellTableViewCell

    var data = searchedData[indexPath.row]


    switch dataFilter 
    case 0:
        tableView.reloadData()
    case 1:

 searchedData = searchedData.sorted(by:  $0.req! > $1.req! )
    case 2:

        searchedData = searchedData.sorted(by:  $0.requisitioner! > $1.requisitioner! )

    case 3:

        data.totalValue = searchedData[indexPath.row].totalValue

    case 4:
        data.dateCreated = searchedData[indexPath.row].dateCreated
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd/MM/yyyy"// yyyy-MM-dd"
        var convertedArray = [Date]()

        for dat in searchedData 

            let date1 = dateFormatter.date(from: dat.dateCreated!)

            if let date = date1 

                convertedArray.append(date)
            
        

        let ready = convertedArray.sorted(by:  $0.compare($1) == .orderedDescending )
        print(ready)
    default:

        data = searchedData[indexPath.row]

    



    print("req|:\(String(describing: data.req))")
    cell.reqLbl.text = data.req
    cell.requisitionerLbl.text = data.requisitioner
    cell.totalValueLbl.text = data.totalValue
    cell.dateCreatedLbl.text = data.dateCreated

    let ChecktapGesture = UITapGestureRecognizer(target: self, action: #selector(self.checktapBtnAction(_:)))
    cell.tickImageView.tag = indexPath.row
    cell.tickImageView.addGestureRecognizer(ChecktapGesture)
    cell.tickImageView.isUserInteractionEnabled = true

    let passReqtapGesture = UITapGestureRecognizer(target: self, action: #selector(self.passReqtapBtnAction(_:)))
    cell.passReqNo.tag = indexPath.row
    cell.passReqNo.addGestureRecognizer(passReqtapGesture)
    cell.passReqNo.isUserInteractionEnabled = true


    return cell

我无法从 searchData 数组中过滤数据。任何帮助都非常感谢...

【问题讨论】：

您需要搜索数据或排序数据？

如果您需要搜索数据，那么您要搜索的字符串在哪里？

@AbuUlHassan 我正在尝试根据日期、req no、requisitioner 和 totalvalue 对数据进行排序。

【参考方案1】：

从 cellForRow 方法中移除切换条件并添加到 segmentedControl 动作方法中 如下所示，看看魔法

    var sampleData = [RequisitionModel(req: "123", requisitioner: "eqqw", totalValue: "4123", dateCreated: "05/7/2022"),
        RequisitionModel(req: "1234", requisitioner: "seqw", totalValue: "0123", dateCreated: "20/8/2022"),
        RequisitionModel(req: "134", requisitioner: "efqw", totalValue: "56123", dateCreated: "10/5/2022"),
        RequisitionModel(req: "3634", requisitioner: "eqw", totalValue: "6123", dateCreated: "20/9/2022"),
        RequisitionModel(req: "22234", requisitioner: "deqw", totalValue: "123", dateCreated: "20/10/2022")]



       @IBAction func segmentedControlAction(sender: AnyObject) 

    switch segmentFilter.selectedSegmentIndex 

     case 0:
      searchData = sampleData
break
    case 1:

 searchedData = searchedData.sorted(by:  $0.req! > $1.req! )
    case 2:    
        searchedData = searchedData.sorted(by:  $0.requisitioner! > $1.requisitioner! )
break

    case 3:

        searchedData =  $0. totalValue! > $1. totalValue! 

    break
    case 4:
        data.dateCreated = searchedData[indexPath.row].dateCreated
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd/MM/yyyy"// yyyy-MM-dd"
let searchedData = searchedData r.sorted  dateFormatter.date(from: $0. dateCreated!)! > dateFormatter.date(from: $1. dateCreated!)! 

        print(ready)
break
    default:
searchData = sampleData
 
 tableView.reloadData()

unc tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 

let cell = tableView.dequeueReusableCell(withIdentifier: "prCell", for: indexPath) as! PrListCellTableViewCell

var data = searchedData[indexPath.row]
print("req|:\(String(describing: data.req))")
cell.reqLbl.text = data.req
cell.requisitionerLbl.text = data.requisitioner
cell.totalValueLbl.text = data.totalValue
cell.dateCreatedLbl.text = data.dateCreated

let ChecktapGesture = UITapGestureRecognizer(target: self, action: #selector(self.checktapBtnAction(_:)))
cell.tickImageView.tag = indexPath.row
cell.tickImageView.addGestureRecognizer(ChecktapGesture)
cell.tickImageView.isUserInteractionEnabled = true

let passReqtapGesture = UITapGestureRecognizer(target: self, action: #selector(self.passReqtapBtnAction(_:)))
cell.passReqNo.tag = indexPath.row
cell.passReqNo.addGestureRecognizer(passReqtapGesture)
cell.passReqNo.isUserInteractionEnabled = true
return cell

【讨论】：

在分段控制操作中我没有 data.totalValue = searchedData[indexPath.row].totalValue indexpath。

它显示错误实例成员“行”不能用于类型“索引路径”