Jochen Schöllig jochenschoellig
jochenschoellig
/ ChatCollectionViewFlowLayout.swift
Created
January 19, 2017 15:49
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.
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| 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]? |