swift - JTAppleCalendar Swift 3.2中的cellForItemAt日期上的自定义单元格错误

我在项目中添加了JTAppleCalendar，并且希望在某些日历单元格中添加一些标签。我成功添加了它们，但是当我在日历月中向左或向右滚动时，标记内的单元格消失，隐藏或混合，并且当我一次又一次滚动时，混合越来越多。我需要任何协议(protocol)或委托(delegate)等吗？或者，这仅仅是一个错误？



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
    }

实际发生的错误:

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

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

最佳答案

基本上，要做出一个怪异的“解决方法”，您应该实现经典的 UICollectionView (JTAppleCalendar源自它)willDisplay method，如您所见，从理论上讲，它应该用于检测单元格的添加而不是复制其内容，因此要重新构建内容，您可以按照示例进行操作，该示例也向swt nub gitHub在此页面中报告了 JTAppleCalendar issues here和进行了说明。

因此，您的代码可能是:

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):

在您发表评论之后，我决定深入分析您的代码。

首先，在mainStoryBoard中有一个小错误，您可以轻松地更正它，如下面的图片所示，用DesignableButton替换UIButton(不存在的类)，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(delegate)，该委托(delegate)解决了有关单元格渲染的许多问题。

我已经在TagListView.swift类中找到了您的问题，更确切地说是在reset方法中找到了您的问题。

TagListView.swift:

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

此方法从 super View 中删除所有标签列表(标签数组)，但不删除过去添加到 super View 中的其他标签，换句话说，仅删除数组tags中包含的标签。因此，为避免此问题，您可以通过在线添加来增强reset方法(我们知道它们是UILabel，因此不需要知道所有的tag号):

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

要优化您的代码，只需将此方法更正为:

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

输出: