ios - Swift 3 中的 JTAppleCalendar 单元格背景颜色更改错误

Question

我在我的项目中使用 JTAppleCalendar 你可以在这里看到它 -> https://github.com/patchthecode/JTAppleCalendar .但是，当我想更改某些单元格中的背景颜色时，我遇到了大问题，当我过去几个月和下个月时，某些单元格背景颜色会发生变化吗？

How it is possible ? How can I fix it ? I want to change only; Example ;

let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName:"Mains")
let predicate = NSPredicate (format:"date = %@",freshdate)
fetchRequest.predicate = predicate

if let result = try? context.fetch(fetchRequest) as! [Mains] {
    for object in result {
        if(object.user! == "" < freshdate) {
           cell.contentView.backgroundColor = hexStringToUIColor(hex:  "f7bca6")
        } else if(object.userme! == "") {
           cell.contentView.backgroundColor = hexStringToUIColor(hex:  "f7bca6")
        } else {
           cell.contentView.backgroundColor = hexStringToUIColor(hex:  "ffffff")
       }
    }
}

一个，但是当我再过一个月时，在日历中看一些单元格背景发生了变化。

下图显示了应用程序打开时的真实情况。

但是当我过去的上个月或下个月改变了下面的一些单元格背景。这是错误的。我不想改变那个。

我的代码在下面，哪里会出错？

@IBOutlet weak var calendarView: JTAppleCalendarView!
let kStartDate = "2016-01-01"
let kEndDate = "2049-12-31"
var numberOfRows = 6
let formatter = DateFormatter()
var myCalendar = Calendar(identifier: .gregorian)
var generateInDates: InDateCellGeneration = .forAllMonths
var generateOutDates: OutDateCellGeneration = .off
var hasStrictBoundaries = true
let firstDayOfWeek: DaysOfWeek = .monday
var monthSize: MonthSize? = nil

extension ViewController: JTAppleCalendarViewDelegate, JTAppleCalendarViewDataSource {
   func configureCalendar(_ calendar: JTAppleCalendarView) -> ConfigurationParameters {
      formatter.dateFormat = "yyyy-MM-dd"
      formatter.timeZone = TimeZone(secondsFromGMT: 0)
      formatter.locale = Locale(identifier: "en_US")

      let startDate = formatter.date(from: kStartDate)!
      let endDate = formatter.date(from: kEndDate)!      
      let parameters = ConfigurationParameters(startDate: startDate,
                                                     endDate: endDate,
                                                     numberOfRows: numberOfRows,
                                                     calendar: myCalendar,
                                                     generateInDates: generateInDates,
                                                     generateOutDates: generateOutDates,
                                                     firstDayOfWeek: firstDayOfWeek,
                                                     hasStrictBoundaries: hasStrictBoundaries)
      return parameters
   }

   func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
        let cell = calendar.dequeueReusableCell(withReuseIdentifier: "CellView", for: indexPath) as! CellView
        let comedate = String(describing: myCalendar.date(byAdding: .day, value: 1, to: cellState.date))
        var freshdate = comedate.substring(from: 9)
        freshdate = freshdate.substring(to: 10)

        let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName:"Mains")
        let predicate = NSPredicate (format:"date = %@",freshdate)
        fetchRequest.predicate = predicate

        if let result = try? context.fetch(fetchRequest) as! [Mains] {
            for object in result {
                if(object.user! == "" < freshdate) {
                   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "f7bca6")
                } else if(object.userme! == "") {
                   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "f7bca6")
                } else {
                   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "ffffff")
                }
            }
        }

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

Answer 1

我认为这是重用单元格问题，您可以尝试设置默认背景颜色。

if freshdate == "2017-04-16" {
   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "f7bca6")
} else if freshdate == "2017-04-28" {
   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "45ca6")
} else {
   cell.contentView.backgroundColor = hexStringToUIColor(hex:  "your_color")
}