NetNewsWire/iOS/UIKit Extensions/UITableView-Extensions.swift

38 lines
1.1 KiB
Swift

//
// UITableView-Extensions.swift
// RSCoreiOS
//
// Created by Maurice Parker on 9/6/19.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import UIKit
extension UITableView {
/**
Selects a row and scrolls it to the middle if it is not visible
*/
public func selectRowAndScrollIfNotVisible(at indexPath: IndexPath, animations: Animations) {
selectRow(at: indexPath, animated: animations.contains(.select), scrollPosition: .none)
if let visibleIndexPaths = indexPathsForRows(in: safeAreaLayoutGuide.layoutFrame) {
if !(visibleIndexPaths.contains(indexPath) && cellCompletelyVisable(indexPath)) {
scrollToRow(at: indexPath, at: .middle, animated: animations.contains(.scroll))
}
}
}
func cellCompletelyVisable(_ indexPath: IndexPath) -> Bool {
let rect = rectForRow(at: indexPath)
return safeAreaLayoutGuide.layoutFrame.contains(rect)
}
public func middleVisibleRow() -> IndexPath? {
if let visibleIndexPaths = indexPathsForRows(in: safeAreaLayoutGuide.layoutFrame), visibleIndexPaths.count > 2 {
return visibleIndexPaths[visibleIndexPaths.count / 2]
}
return nil
}
}