invalidateLayout() removed from collectionContext?

[Megaman63]

New issue checklist

• [ ] I have reviewed the README and documentation
• [ ] I have searched existing issues and this is not a duplicate

General information

• IGListKit version: 2.0.0
• iOS version(s): 10.0
• CocoaPods/Carthage version:
• Xcode version: 8
• Devices/Simulators affected: iPhone 7
• Reproducible in the demo project? (Yes/No):
• Related issues: Hello. How can i animate cell resize if invalidateLayout() has been removed from IGListCollectionContext in version 2.0.0 (but this method exist in test examples 'mixed data')

[Megaman63]

simple profect:

import UIKit import IGListKit

class Model : NSObject, IGListDiffable {

var id = 0
var color : UIColor!
var height : CGFloat = 0
var expanded = false
func diffIdentifier() -> NSObjectProtocol {
    return id as NSObjectProtocol
}

func isEqual(toDiffableObject object: IGListDiffable?) -> Bool {
    return id == (object as! Model).id
}

}

class ViewController: UIViewController, IGListAdapterDataSource { var models : [Model] = [] var adapter : IGListAdapter! @IBOutlet var collectionView: IGListCollectionView! override func viewDidLoad() { super.viewDidLoad()

    for i in 0...100 {
        let model = Model()
        let r = arc4random()%255
        let g = arc4random()%255
        let b = arc4random()%255

        model.id = i
        model.color = UIColor(red: CGFloat(r) / 255, green: CGFloat(g) / 255, blue: CGFloat(b) / 255, alpha: 1)
        model.height = CGFloat(arc4random() % 200 + 50)
        models.append(model)
    }

    adapter = IGListAdapter(updater: IGListAdapterUpdater(), viewController: self, workingRangeSize: 0)
    adapter.collectionView = collectionView
    adapter.dataSource = self

    collectionView.backgroundColor = UIColor(red: 0.831372549, green: 0.945098039, blue: 0.964705882, alpha: 1)
    let flowLayout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout
    //flowLayout.estimatedItemSize = CGSize(width: collectionView.frame.width, height: 150)

}

//MARK: IGListAdapterDataSource

func objects(for listAdapter: IGListAdapter) -> [IGListDiffable] {
    return models as [IGListDiffable]
}

func listAdapter(_ listAdapter: IGListAdapter, sectionControllerFor object: Any) -> IGListSectionController {
    let f = FeedSectionController()
    f.controller = self
    return f
}

func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }

}

class FeedSectionController: IGListSectionController, IGListSectionType {

public func didSelectItem(at index: Int) {}
var controller : ViewController!
var object : Model!
var expanded = false
override init() {
    super.init()
    inset = UIEdgeInsets(top: 0, left: 0, bottom: 20, right: 0)
    minimumLineSpacing = 4
    minimumInteritemSpacing = 4
}

func numberOfItems() -> Int {
    return  1
}

func sizeForItem(at index: Int) -> CGSize {
    return CGSize(width: collectionContext!.containerSize.width, height: object!.expanded ? object!.height * 2 : object!.height)
}

func cellForItem(at index: Int) -> UICollectionViewCell {
    let cell = collectionContext!.dequeueReusableCellFromStoryboard(withIdentifier: "Cell", for: self, at: index) as! Cell
    cell.imageView.backgroundColor = object!.color
    cell.height.constant = object!.height
    cell.section = self
    cell.model = object
    cell.layoutIfNeeded()
    return cell
}

func didUpdate(to object: Any) {
    self.object = (object as! Model)
}
func update(_ expanded: Bool) {
    object!.expanded = expanded
    controller.adapter.performUpdates(animated: true, completion: nil)
    UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.4, initialSpringVelocity: 0.6,
                   options: [],
                   animations: {
                    self.controller.collectionView.collectionViewLayout.invalidateLayout()
    })
}

}

class Cell : UICollectionViewCell { @IBOutlet var imageView: UIImageView! @IBOutlet var height: NSLayoutConstraint! var expanded = false var model : Model! weak var section : FeedSectionController!

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    height.constant = expanded ? model.height * 2 : model.height
    expanded = !expanded
    print ("height \(height.constant)")
    section.update(expanded)
    UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.4, initialSpringVelocity: 0.6,
                   options: [],
                   animations: {
                    self.contentView.layoutIfNeeded()
    })
}

}

[zhubofei]

@Megaman63 This is a new API that will be added in 3.0.0 release. If you want to use it now, you can use master branch version instead of 2.0.0 release.

pod 'IGListKit', :git => 'https://github.com/Instagram/IGListKit.git', :branch => 'master'