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Ios tableView.reloadSections(sectionIndex,带:。无)工作不正常_Ios_Swift_Uitableview - Fatal编程技术网

Ios tableView.reloadSections(sectionIndex,带:。无)工作不正常

Ios tableView.reloadSections(sectionIndex,带:。无)工作不正常,ios,swift,uitableview,Ios,Swift,Uitableview,我创建了3个headerViews并添加了复选框,当选中section0复选框时,我想展开该部分中的单元格。第一次创建所有部分时,当我选中复选框创建单元格时,但当我取消选中复选框时,它不会隐藏/删除单元格。但我想删除所有单元格或隐藏第0节、第1节等中的所有单元格 我的代码是 var dateArray:[String]?//Globally var button:UIButton?//Globally //Mark - TableView Datasource func tableView(

我创建了3个headerViews并添加了复选框,当选中section0复选框时,我想展开该部分中的单元格。第一次创建所有部分时,当我选中复选框创建单元格时,但当我取消选中复选框时,它不会隐藏/删除单元格。但我想删除所有单元格或隐藏第0节、第1节等中的所有单元格

我的代码是

var dateArray:[String]?//Globally
var button:UIButton?//Globally

//Mark - TableView Datasource
 func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if tableView == filterView?.filterTblView {
        if section == 0 {
            print(dateArray?.count ?? 0)
            return dateArray?.count ?? 0
        } else if section == 1 {
            return callTypeArray.count
        } else {
            return departmentArray.count
        }
    }
    else {
        return 0
    }
}


func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let height:CGFloat!
        if UIDevice.current.userInterfaceIdiom == .pad {
            height = 60
        } else {
            height = 40
        }
        //Create header view
        let headerView = UIView(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: height))
        let lbl = UILabel(frame: CGRect(x: 50, y: 0, width: headerView.frame.width - 50, height: headerView.frame.height))
        lbl.textAlignment = .left

        lbl.text = sectionsArray[section]
        headerView.addSubview(lbl)

        button = UIButton(type: .custom)
        button?.frame = CGRect(x: 10, y: 5, width: 30, height: 30)
        button?.addTarget(self, action: #selector(self.onclickDateCheckMark), for: .touchUpInside)
        button?.setImage(UIImage.init(named: "uncheck"), for: UIControl.State.normal)
        button?.setImage(UIImage.init(named: "check"), for: UIControl.State.selected)
        headerView.addSubview(button!)
        button?.tag = section

        return headerView
}


@objc func onclickDateCheckMark(sender:UIButton) {
    if sender.tag == 0 {
        if sender.isSelected == true {
            sender.isSelected = false
            DispatchQueue.main.async {
//                        self.dateArray?.removeAll()
//                    let indexPaths = self.filterView?.filterTblView.indexPathsForVisibleRows
//                    print(indexPaths as Any)
//                    self.filterView?.filterTblView.reloadRows(at: indexPaths!, with: UITableView.RowAnimation.top)

                self.dateArray?.removeAll()
                let sectionIndex = IndexSet(integer: 0)
                   self.filterView?.filterTblView.reloadSections(sectionIndex, with: .none) // or fade, right, left, top, bottom, none, middle, automatic
            }
        } else {
            DispatchQueue.main.async {
                self.dateArray = ["Today", "Yesterday", "This week", "Last week", "This month", "Last month", "Last 30days"]
//                    print(self.dateArray!)
//                    let indexPaths = self.filterView?.filterTblView.indexPathsForVisibleRows
//                    print(indexPaths as Any)
//                    self.filterView?.filterTblView.reloadRows(at: indexPaths!, with: UITableView.RowAnimation.top)
                let sectionIndex = IndexSet(integer: 0)
                self.filterView?.filterTblView.reloadSections(sectionIndex, with: .none) // or fade, right, left, top, bottom, none, middle, automatic
            }
            sender.isSelected = true
        }
    }

    if sender.tag == 1 {
        if sender.isSelected == true {
            sender.isSelected = false
            DispatchQueue.main.async {
                self.callTypeArray?.removeAll()
                let sectionIndex = IndexSet(integer: 1)
                self.filterView?.filterTblView.reloadSections(sectionIndex, with: .none)
            }
        } else {
            DispatchQueue.main.async {
                self.callTypeArray = ["1", "2", "3", "4"]
                let sectionIndex = IndexSet(integer: 1)
                self.filterView?.filterTblView.reloadSections(sectionIndex, with: .none)
            }
            sender.isSelected = true
        }
    }

    if sender.tag == 2 {
        if sender.isSelected == true {
            sender.isSelected = false
        } else {
            sender.isSelected = true
        }
    }


}
根据我在
视图forheaderinsection部分的观察:
复选框按钮在调用
重新加载节时再次创建。这就是为什么在
onclickDateCheckMark
中,它没有进入if条件
if sender.isSelected==true{}
,而是直接进入false条件

  • 创建2个数组,第一个用于数据源,第二个用于存储选定的节索引

    var arrDataSource : [Any] = [] // your data for all three section, datatype will be as per your requirement
    var arrSelectedIndex : [Int] = [] // initially its empty as when VC loads on section will be expanded, if you want to expand any section initially then fill array with that section.
    
  • 在视图加载中

    arrDataSource = [arrSection1, arrSection2,arrSection3] // manage your data with single array.. its more dynamic for future purpose 
    
    return arrSelectedIndex.contains(section) ? (arrDataSource[section] as AnyObject).count : 0
    
  • 在numberOfSections中

    func numberOfSections(in tableView: UITableView) -> Int {
        return arrDataSource.count
    }
    
  • 假设您的
    viewForHeaderInSection
    工作正常,这里给出按钮标签(您已经完成了)

  • 按钮操作上

    // First check in section is selected or not.
    if arrSelectedIndex.contains(sender.tag){
        // IF section is selecetd then remove it from arrSelectedIndex
        let aIndex = arrSelectedIndex.firstIndex(of: sender.tag)
        if let aInt = aIndex {
            arrSelectedIndex.remove(at: aInt)
        }
    }
    else{
        // IF section is not selecetd then add it to arrSelectedIndex
        arrSelectedIndex.append(sender.tag)
    }
    // reload tableview
    tblView.reloadSections([sender.tag], with: .automatic)
    
  • 在第节的行数中

    arrDataSource = [arrSection1, arrSection2,arrSection3] // manage your data with single array.. its more dynamic for future purpose 
    
    return arrSelectedIndex.contains(section) ? (arrDataSource[section] as AnyObject).count : 0
    

  • 注意:这是一个想法和最佳方法,如果我忘记了任何条件或您有任何疑问,请在下面发表评论。

    单击标题,您希望显示该部分的所有单元格??。。。一次是否扩展一个部分??什么是
    dateArray
    ?我想展开单元格的一部分。但是,当我选中两个节复选框时,我想扩展两个节单元格。@dahiya_boy,你能问我更详细的情况吗?不介意,但你不会认为数百万个条件给了你一个不必要的麻烦。更好的是,你可以制作额外的数组来存储节索引并检查此数组的扩展折叠。。我更喜欢bcz now代码更方便、更干净。。其余最后的电话将由您决定。。现在,据我所知,您有3个部分,希望在单击时扩展该部分,并在第二次单击时关闭该部分。对于这三个部分,您有三个不同的数组。是的,您是对的,您能为我建议解决方案吗?谢谢,您的代码运行良好,但如何将选中和未选中的图像设置为按钮。button?.setImage(UIImage.init(名为:“取消选中”),用于:UIControl.State.normal)button?.setImage(UIImage.init(名为:“选中”),用于:UIControl.State.selected)@iOS您已经为按钮状态设置了图像,所以在它下面您可以执行
    button.isSelected=arrSelectedIndex.contains(部分)
    非常好…谢谢