devpolant
/ ChatCollectionViewFlowLayout.swift
Created
August 9, 2018 07:26
— forked from jochenschoellig/ChatCollectionViewFlowLayout.swift
A subclass of UICollectionViewFlowLayout to get chat behavior without turning collection view upside-down. This layout is written in Swift 3 and absolutely usable with RxSwift and RxDataSources because UI is completely separated from any logic or binding.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import UIKit | |
| class ChatCollectionViewFlowLayout: UICollectionViewFlowLayout { | |
| private var topMostVisibleItem = Int.max | |
| private var bottomMostVisibleItem = -Int.max | |
| private var offset: CGFloat = 0.0 | |
| private var visibleAttributes: [UICollectionViewLayoutAttributes]? |