Swift 3.2 中 cellForItemAt 日期的 JTAppleCalendar 自定义单元格错误

Question

我在我的项目中添加了 JTAppleCalendar，我想在我的一些日历单元格中添加一些标签。我成功添加了它们，但是当我在我的日历月份向左或向右滚动时，标签内的单元格消失、隐藏或混合，当我一次又一次滚动时，混合越来越多。我需要任何协议或代表等吗？或者，这只是一个错误？

How can I fix that bug?

My example GitHub project

我的cellForItemAt代码：

func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
        let cell = calendar.dequeueReusableCell(withReuseIdentifier: "CellView", for: indexPath) as! CellView

        var currentdate = String(describing: myCalendar.date(byAdding: .day, value: 1, to: cellState.date))
        currentdate = currentdate.substring(from: 9, length: 10)


        cell.tagList.tags.removeAll()
        cell.tagList.hide()
        cell.contentView.backgroundColor = nil
        cell.tagList.alpha = 0
        cell.tagList.numberOfRows = 0
        cell.tagList.backgroundColor = UIColor.clear
        cell.tagList.isHidden = true


        var i : Int
        i = 0

        for object in datas {

        i =  i + 1

                let clean = "\(object)".components(separatedBy: "*")

                if clean[0] == currentdate {
                   let gotag : Int
                    gotag = Int(clean[1])!
                    cell.tagList.isHidden = false
                    cell.dayLabel.text = cellState.text
                    cell.contentView.backgroundColor = UIColor.gray

                    let itemName = "Item name  \(i)"


                        cell.tagList.alpha = 1

                        if clean[1] == "1" {

                                cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.orange,textColor: UIColor.white,comesTag: gotag)


                        }else if clean[1] == "2" {

                                cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.green,textColor: UIColor.white,comesTag: gotag)

                        }else if clean[1] == "3" {

                                 cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.brown,textColor: UIColor.white,comesTag: gotag)

                        }else if clean[1] == "4" {

                              cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.black,textColor: UIColor.white,comesTag: gotag)
                        }



            }else{

                cell.tagList.backgroundColor = UIColor.clear
        }





        }


        handleCellConfiguration(cell: cell, cellState: cellState)
        return cell
    }

正在执行的错误：

https://github.com/LetSwiftDev/CalendarBug/blob/master/calendarbug.gif

您也可以在这里加入官方 JTAppleCalendar 聊天 https://gitter.im/patchthecode/JTAppleCalendar

Answer 1

我不知道这是否是真正的问题，但您错过了一个功能。实现 willDisplayCell 函数，如下所示 -> https://github.com/patchthecode/JTAppleCalendar/issues/553

这可能会解决您的问题。但奇怪的是，您自定义的框架工作不会警告您忘记实现该功能。

Answer 2

基本上，要制作一个奇怪的 "workaround" 你应该实现 classic UICollectionView（JTAppleCalendar 来自它）willDisplay method, that , as you can see , in theory it should be used to detect cell additions instead of replicate it's content, so to make this re-build of content you can follow the example also explained to the JTAppleCalendar gitHub issues and reported by swift nub 在本页.

因此，您的代码可以是：

ViewController.swift:

extension ViewController: JTAppleCalendarViewDelegate, JTAppleCalendarViewDataSource {
    func calendar(_ calendar: JTAppleCalendarView, willDisplay cell: JTAppleCell, forItemAt date: Date, cellState: CellState, indexPath: IndexPath) {
        var cell = cell as! CellView
        cell = sharedFunctionToConfigureCell(cell: cell, cellState: cellState, date: date)
    }

    func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
        var cell = calendar.dequeueReusableCell(withReuseIdentifier: "CellView", for: indexPath) as! CellView
        cell = sharedFunctionToConfigureCell(cell: cell, cellState: cellState, date: date)
        return cell
    }

    func sharedFunctionToConfigureCell(cell: CellView, cellState: CellState, date: Date)-> CellView {
        var currentdate = String(describing: myCalendar.date(byAdding: .day, value: 1, to: cellState.date))
        currentdate = currentdate.substring(from: 9, length: 10)
        cell.tagList.tags.removeAll()
        cell.tagList.hide()
        cell.contentView.backgroundColor = nil
        cell.tagList.alpha = 0
        cell.tagList.numberOfRows = 0
        cell.tagList.backgroundColor = UIColor.clear
        cell.tagList.isHidden = true
        var i : Int
        i = 0
        for object in datas {
            i =  i + 1
            let clean = "\(object)".components(separatedBy: "*")
            if clean[0] == currentdate {
                let gotag : Int
                gotag = Int(clean[1])!
                cell.tagList.isHidden = false
                cell.dayLabel.text = cellState.text
                cell.contentView.backgroundColor = UIColor.gray
                let itemName = "Item name  \(i)"
                cell.tagList.alpha = 1
                if clean[1] == "1" {
                    cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.orange,textColor: UIColor.white,comesTag: gotag)
                }else if clean[1] == "2" {
                    cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.green,textColor: UIColor.white,comesTag: gotag)
                }else if clean[1] == "3" {
                    cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.brown,textColor: UIColor.white,comesTag: gotag)
                }else if clean[1] == "4" {
                    cell.tagList.addTag(itemName, target: self, tapAction: #selector(ViewController.tap(_:)), longPressAction: #selector(ViewController.tap(_:)),backgroundColor: UIColor.black,textColor: UIColor.white,comesTag: gotag)
                }
            }else{
                cell.tagList.backgroundColor = UIColor.clear
            }
        }
        handleCellConfiguration(cell: cell, cellState: cellState)
        return cell
    }

    // your other code..

更新（测试后）：

根据您的意见，我决定深入分析您的代码。

首先，您的 mainStoryBoard 中有一个小错误，您可以很容易地更正它，用 UIButton 替换 DesignableButton（不存在的 class），如图所示，以避免错误：CalendarBug[9879:1645088] Unknown class _TtC11CalendarBug16DesignableButton in Interface Builder file.

之后，完整的 JTAppleCaledar 库似乎没有任何问题，实际上作者还扩展了 willDisplay 委托，解决了单元格渲染的许多问题。

我在 TagListView.swift class 中发现了您的问题，更准确地说是在 reset.

方法中

TagListView.swift:

func reset() {
  for tag in tags {
      tag.removeFromSuperview()
  }
  tags = []
  currentRow = 0
  numberOfRows = 0
}

此方法从 superview 中删除所有标签列表（标签数组），但不删除过去添加到 superview 的其他标签，换句话说，仅包含数组 tags 中的标签。所以，为了避免这个问题，你可以通过在线添加来加强你的 reset 方法（我们知道它们是 UILabel 所以不需要知道它们所有的 tag 号码）：

func reset() {
  for tag in tags {
      tag.removeFromSuperview()
  }
  tags = []
  currentRow = 0
  numberOfRows = 0
  self.subviews.forEach({ if [=12=] is UILabel { [=12=].removeFromSuperview()} })
}

要优化您的代码，您只需将此方法更正为：

func reset(){
    tags = []
    currentRow = 0
    numberOfRows = 0
    self.subviews.forEach({ if [=13=] is UILabel { [=13=].removeFromSuperview()} })
}

输出:

Swift 3.2 中 cellForItemAt 日期的 JTAppleCalendar 自定义单元格错误

JTAppleCalendar Custom cell bug on cellForItemAt date in Swift 3.2

calendar

swift

swift3

jtapplecalendar

swift4

ViewController.swift:

更新（测试后）：

TagListView.swift: