Problem with selection of a date and then scroll to another month where i'm now able to select two dates. The first date doesn't get deselected

[nickinylin]

Hello! Thank you for all the wonderful work!
I'm using version 7.1.1
I have a problem with the selection of a date. If i select a date in a month and i fx scroll to the month before where this date is also shown, it won't be deselected. So now i'm marking 2 dates. I've attached two pictures to show it. My code is also attached.
Thank you!

//
//  SpecificChallengeViewController.swift
//  FitnessWorkout
//
//  Created by Nicki on 28/10/2017.
//  Copyright © 2017 Nicki. All rights reserved.
//

import UIKit
import JTAppleCalendar
import Firebase
import FirebaseAuth

class SpecificChallengeViewController: UIViewController {
    
    let formatter = DateFormatter()
    var opponentUser: UserModel?
    var opponentEmail: String?
    var dbRefCurrentUser: DatabaseReference!
    var dbRefOpponent: DatabaseReference!
    var trainingDatesUser = [TrainingDates]()
    var trainingDatesOpponent = [TrainingDates]()
    var boolChallengeCalendar: Bool?
    
    @IBOutlet weak var calendarView: JTAppleCalendarView!
    @IBOutlet weak var labelYear: UILabel!
    @IBOutlet weak var labelMonth: UILabel!
    
  
    @IBOutlet weak var textViewUser: UITextView!
    @IBOutlet weak var textViewOppo: UITextView!
    @IBOutlet weak var labelSplitter: UILabel!

    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        

        setupCalenderView()
        
        
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        calendarView.scrollToDate(Date())
    }
    
    func setupCalenderView() {
        calendarView.minimumLineSpacing = 0
        calendarView.minimumInteritemSpacing = 0
        
        //Setup labels
        calendarView.visibleDates { (visibleDates) in
            self.setupViewsOfCalendar(from: visibleDates)
        }   
    }

    func setupViewsOfCalendar(from visibleDates: DateSegmentInfo) {
        let date = visibleDates.monthDates.first!.date
        
        formatter.dateFormat = "YYYY"
        labelYear.text = formatter.string(from: date)
        
        formatter.dateFormat = "MMMM"
        labelMonth.text = formatter.string(from: date)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        
    }
    
    func handleCellSelected(view: JTAppleCell?, cellState: CellState, date: Date) {
        guard let validCell = view as? CustomCalenderCollectionViewCell else { return }
        
        if cellState.isSelected {
            validCell.selectedView.isHidden = false
//            validCell.selectedView.backgroundColor = UIColor.blue.withAlphaComponent(0.3)
//            validCell.selectedView.layer.cornerRadius =  20
//        } else if (Calendar.current.isDateInToday(date) ) {
//            validCell.selectedView.isHidden = false
//            validCell.selectedView.layer.cornerRadius =  40
//            validCell.selectedView.backgroundColor = UIColor.gray.withAlphaComponent(0.3)
        } else {
            validCell.selectedView.isHidden = true
        }
        
    }

    func handleCellTextColor(view: JTAppleCell?, cellState: CellState, date: Date) {
        guard let validCell = view as? CustomCalenderCollectionViewCell else { return }
        if cellState.isSelected {
            validCell.dateLabel.textColor = UIColor.blue
        } else {
            if cellState.dateBelongsTo == .thisMonth {
                validCell.dateLabel.textColor = UIColor.black
            } else {
                validCell.dateLabel.textColor = UIColor.lightGray
            }
        }   
    }
}

extension SpecificChallengeViewController: JTAppleCalendarViewDataSource {
    public func calendar(_ calendar: JTAppleCalendarView, willDisplay cell: JTAppleCell, forItemAt date: Date, cellState: CellState, indexPath: IndexPath) {
        
    }
    
    public func configureCalendar(_ calendar: JTAppleCalendarView) -> ConfigurationParameters {
        
        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        formatter.timeZone = Calendar.current.timeZone
        formatter.locale = Calendar.current.locale
        
        var startDate: Date = formatter.date(from: "2017-10-01 22:00:00")!
        var endDate: Date = formatter.date(from: "2018-12-31 22:00:00")!
        
        
         let parameters = ConfigurationParameters(startDate: startDate, endDate: Date(), numberOfRows: 6, firstDayOfWeek: .monday)
        
        return parameters
    }
    
}

extension SpecificChallengeViewController: JTAppleCalendarViewDelegate {
    

    
    public func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
        let cell = calendar.dequeueReusableJTAppleCell(withReuseIdentifier: "customCellCalendar", for: indexPath) as! CustomCalenderCollectionViewCell
        cell.dateLabel.text = cellState.text
        
    
        cell.didTraingThatDayUser.backgroundColor = UIColor.white
        cell.didTraingThatDayOppo.backgroundColor = UIColor.white

        
        handleCellSelected(view: cell, cellState: cellState, date: date)
        handleCellTextColor(view: cell, cellState: cellState, date: date)
        
        return cell
    }
    
    public func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
        handleCellSelected(view: cell, cellState: cellState, date: date)
        handleCellTextColor(view: cell, cellState: cellState, date: date)

        
        
    }
    
    public func calendar(_ calendar: JTAppleCalendarView, didDeselectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
        handleCellSelected(view: cell, cellState: cellState, date: date)
        handleCellTextColor(view: cell, cellState: cellState, date: date)
    }
    
    func calendar(_ calendar: JTAppleCalendarView, shouldSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) -> Bool {
        if cellState.dateBelongsTo != .thisMonth {
            return false
        }
        return true
    }
    
    public func calendar(_ calendar: JTAppleCalendarView, didScrollToDateSegmentWith visibleDates: DateSegmentInfo) {
        setupViewsOfCalendar(from: visibleDates)

    }
    
}

[patchthecode]

You did not implement the will display cell function.
In version 7.1.1 I force every developer to implement it.
The reason is explained here -> #553

Can you let me know if this fixed your issue?

[nickinylin]

Yes this solved my issue. Thank you! Have a nice day :)

[patchthecode]

awesome.

[cyrilzakka]

Hey, sorry to reopen this issue, but I too am experiencing this issue. If I select an 'out of month day' then select another date, the out of month day remains selected. I have implement the 'willDisplay' method as shown in the screenshot. Additionally, how do I prevent the out days from being selected, but enable the cell from the previous/next month to remain selected?

Update 1: It seems that willDisplay is not being called. Am investigating.
Update 2: I've worked around the issue by including the below function (Screenshot 2) in didSelect()

[patchthecode]

@cyrilzakka did you reset your cells.

[cyrilzakka]

@patchthecode I seem to have missed this step, my apologies. Was it in one of the first two videos? Where can I find it?

[patchthecode]

@cyrilzakka I sorry, i misread the question you asked.
mind joining me here? https://gitter.im/patchthecode/JTAppleCalendar

[patchthecode]

issue resolved. user was dequeueing inside the willDisplay function.