How to create a new collectionView when switching to another calendarView - swift

Question

I am having trouble trying to create a new collection view. I want to effectively have a collectionView with unique properties and then when I click on a date in my view controller it changes to a effectively a blank collectionView template so that the user can then put it there recipes.
How would I go about changing the collectionView (when user clicked on a date), change to a collection-view template and then save when the user puts in data?
Here is the code for the controller along with a picture example:
import UIKit
import GCCalendar
class CalendarViewController123: UIViewController, UICollectionViewDelegate {
// MARK: Properties
fileprivate var calendarView: GCCalendarView!
#IBOutlet weak var collectionView: UICollectionView!
#IBOutlet weak var datelabel: UILabel!
#IBOutlet weak var open: UIBarButtonItem!
#IBAction func trytoday(_ sender: Any) {
self.calendarView.select(date: Date())
}
}
// MARK: - View
extension CalendarViewController123 {
override func viewDidLoad() {
super.viewDidLoad()
open.target = revealViewController()
open.action = #selector(SWRevealViewController.revealToggle(_:))
self.addToolbar()
self.addCalendarView()
self.addConstraints()
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for:.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
}
}
// MARK: - Toolbar
extension CalendarViewController123 {
fileprivate func addToolbar() {
self.navigationController!.isToolbarHidden = false
let space = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let displayMode = UIBarButtonItem(title: "Display Mode", style: .plain, target: self, action: #selector(self.displayMode))
self.toolbarItems = [ space, displayMode]
}
#objc func displayMode() {
self.calendarView.displayMode = (self.calendarView.displayMode == .month) ? .week : .month
}
}
// MARK: - Calendar View
fileprivate extension CalendarViewController123 {
func addCalendarView() {
self.calendarView = GCCalendarView()
self.calendarView.delegate = self
self.calendarView.displayMode = .week
self.calendarView.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(self.calendarView)
}
}
// MARK: - Constraints
fileprivate extension CalendarViewController123 {
func addConstraints() {
self.calendarView.topAnchor.constraint(equalTo: self.topLayoutGuide.bottomAnchor, constant: 2).isActive = true
self.calendarView.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
self.calendarView.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true
self.calendarView.heightAnchor.constraint(equalToConstant: 325).isActive = true
}
}
// MARK: - GCCalendarViewDelegate
extension CalendarViewController123: GCCalendarViewDelegate {
func calendarView(_ calendarView: GCCalendarView, didSelectDate date: Date, inCalendar calendar: Calendar) {
let dateFormatter = DateFormatter()
dateFormatter.calendar = calendar
dateFormatter.dateFormat = DateFormatter.dateFormat(fromTemplate: "MMM dd", options: 0, locale: calendar.locale)
//yyyy
// self.navigationItem.title = dateFormatter.string(from: date)
self.datelabel.text = dateFormatter.string(from: date)
}
}
The Green is the collectionView on a view controller

Answer 1

It depends on what data you are showing and how you are retrieving it. If you can provide more information I will update my answer accordingly.
1. Select Date
#IBAction func trytoday(_ sender: Any) {
self.calendarView.select(date: Date())
self.fetchData(forDate: selectedDate)
}
2. Fetch Data
func fetchData(forDate date: Date) {
//Fetch data and return array of objects
self.objects = retreivedObjects
self.collectionView.reloadData()
}
3. Load Data
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return objects.count
}
4. Setup Cell with Data
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? Cell else { return UICollectionViewCell}
cell.configure(withObject: objects[indexPath.item])
return cell
}