IGListKit/Examples/Examples-iOS/IGListKitExamples/SectionControllers/DisplaySectionController.swift

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import IGListKit
import IGListSwiftKit
import UIKit

final class DisplaySectionController: ListSectionController, ListDisplayDelegate {

    override init() {
        super.init()
        displayDelegate = self
        inset = UIEdgeInsets(top: 0, left: 0, bottom: 30, right: 0)
    }

    override func numberOfItems() -> Int {
        return 4
    }

    override func sizeForItem(at index: Int) -> CGSize {
        return CGSize(width: collectionContext!.containerSize.width, height: 55)
    }

    override func cellForItem(at index: Int) -> UICollectionViewCell {
        guard let cell: LabelCell = collectionContext?.dequeueReusableCell(for: self, at: index) else {
            fatalError()
        }
        cell.text = "Section \(self.section), cell \(index)"
        return cell
    }

    // MARK: ListDisplayDelegate

    func listAdapter(_ listAdapter: ListAdapter, willDisplay sectionController: ListSectionController) {
        print("Will display section \(self.section)")
    }

    func listAdapter(_ listAdapter: ListAdapter,
                     willDisplay sectionController: ListSectionController,
                     cell: UICollectionViewCell,
                     at index: Int) {
                       print("Did will display cell \(index) in section \(self.section)")
    }

    func listAdapter(_ listAdapter: ListAdapter, didEndDisplaying sectionController: ListSectionController) {
        print("Did end displaying section \(self.section)")
    }

    func listAdapter(_ listAdapter: ListAdapter,
                     didEndDisplaying sectionController: ListSectionController,
                     cell: UICollectionViewCell,
                     at index: Int) {
                       print("Did end displaying cell \(index) in section \(self.section)")
    }

}