255 lines
10 KiB
Swift
255 lines
10 KiB
Swift
//
|
|
// ThreeLayerTableViewController.swift
|
|
// MVMCoreUI
|
|
//
|
|
// Created by Scott Pfeil on 4/18/19.
|
|
// Copyright © 2019 Verizon Wireless. All rights reserved.
|
|
//
|
|
|
|
import UIKit
|
|
import MVMAnimationFramework
|
|
|
|
open class ThreeLayerTableViewController: MFProgrammaticTableViewController {
|
|
// The three main views
|
|
private var topView: UIView?
|
|
private var bottomView: UIView?
|
|
private var headerView: UIView?
|
|
private var footerView: UIView?
|
|
private var safeAreaView: UIView?
|
|
var useMargins: Bool = true
|
|
var bottomViewOutsideOfScrollArea: Bool = false
|
|
private var topViewBottomConstraint: NSLayoutConstraint?
|
|
private var bottomViewTopConstraint: NSLayoutConstraint?
|
|
|
|
//MARK: - MFViewController
|
|
open override func updateViews() {
|
|
super.updateViews()
|
|
let width = view.bounds.width
|
|
if let topView = topView as? MVMCoreViewProtocol {
|
|
topView.updateView(width)
|
|
showHeader(width)
|
|
}
|
|
if let bottomView = bottomView as? MVMCoreViewProtocol {
|
|
bottomView.updateView(width)
|
|
showFooter(width)
|
|
}
|
|
self.tableView?.reloadData()
|
|
}
|
|
|
|
open override func newDataBuildScreen() {
|
|
super.newDataBuildScreen()
|
|
createViewForTableHeader()
|
|
createViewForTableFooter()
|
|
tableView?.reloadData()
|
|
}
|
|
|
|
override open func viewDidLoad() {
|
|
super.viewDidLoad()
|
|
setToHaveNoSectionHeadersFooters()
|
|
// Do any additional setup after loading the view.
|
|
}
|
|
|
|
//MARK: - Spacing
|
|
// If both are subclassed to return a value, then the buttons will not be pinned towards the bottom because neither spacing would try to fill the screen.
|
|
/// Space between the top view and the table sections, nil to fill. 0 default
|
|
open func spaceBelowTopView() -> CGFloat? {
|
|
return 0
|
|
}
|
|
|
|
/// Space between the bottom view and the table sections, nil to fill. nil default
|
|
open func spaceAboveBottomView() -> CGFloat? {
|
|
return nil
|
|
}
|
|
|
|
/// can override to return a minimum fill space.
|
|
open func minimumFillSpace() -> CGFloat {
|
|
return 0
|
|
}
|
|
|
|
open override func updateViewConstraints() {
|
|
super.updateViewConstraints()
|
|
guard let tableView = tableView else {
|
|
return
|
|
}
|
|
|
|
let minimumSpace: CGFloat = minimumFillSpace()
|
|
var currentSpace: CGFloat = 0
|
|
var totalMinimumSpace: CGFloat = 0
|
|
|
|
var fillTop = false
|
|
if spaceBelowTopView() == nil, self.tableView?.tableHeaderView != nil {
|
|
fillTop = true
|
|
currentSpace += topViewBottomConstraint?.constant ?? 0
|
|
totalMinimumSpace += minimumSpace
|
|
}
|
|
|
|
var fillBottom = false
|
|
if spaceAboveBottomView() == nil, !bottomViewOutsideOfScrollArea, self.tableView?.tableFooterView != nil {
|
|
fillBottom = true
|
|
currentSpace += bottomViewTopConstraint?.constant ?? 0
|
|
totalMinimumSpace += minimumSpace
|
|
}
|
|
|
|
guard fillTop || fillBottom else {
|
|
return
|
|
}
|
|
let newSpace = MVMCoreUIUtility.getVariableConstraintHeight(currentSpace, in: tableView, minimumHeight: totalMinimumSpace)
|
|
|
|
// If the bottom view is outside of the scroll, then only the top view constraint is being used, so we have to double it to account for the bottom constraint not being there when we compare to the new value.
|
|
var currentSpaceForCompare: CGFloat = currentSpace
|
|
if fillTop && bottomViewOutsideOfScrollArea {
|
|
currentSpaceForCompare = currentSpace * 2;
|
|
}
|
|
|
|
let width = view.bounds.width
|
|
if !MVMCoreGetterUtility.cgfequalwiththreshold(newSpace, currentSpaceForCompare, 0.1) {
|
|
if fillTop && fillBottom {
|
|
// space both
|
|
let half = newSpace / 2
|
|
topViewBottomConstraint?.constant = half
|
|
bottomViewTopConstraint?.constant = half
|
|
showHeader(width)
|
|
showFooter(width)
|
|
} else if fillTop {
|
|
// Only top is spaced (half the size if the bottom view is out of the scroll because it needs to be sized as if there are two spacers but there is only one.
|
|
if bottomViewOutsideOfScrollArea {
|
|
topViewBottomConstraint?.constant = newSpace / 2
|
|
} else {
|
|
topViewBottomConstraint?.constant = newSpace
|
|
}
|
|
showHeader(width)
|
|
} else if fillBottom {
|
|
// Only bottom is spaced.
|
|
bottomViewTopConstraint?.constant = newSpace
|
|
showFooter(width)
|
|
}
|
|
}
|
|
}
|
|
|
|
//MARK: - Header Footer
|
|
/// Gets the top view and adds it to a spacing view, headerView, and then calls showHeader.
|
|
open func createViewForTableHeader() {
|
|
let topView = viewForTop()
|
|
self.topView = topView
|
|
|
|
let headerView = MVMCoreUICommonViewsUtility.commonView()
|
|
headerView.addSubview(topView)
|
|
topView.topAnchor.constraint(equalTo: headerView.topAnchor).isActive = true
|
|
topView.leftAnchor.constraint(equalTo: headerView.leftAnchor).isActive = true
|
|
headerView.rightAnchor.constraint(equalTo: topView.rightAnchor).isActive = true
|
|
topViewBottomConstraint = headerView.bottomAnchor.constraint(equalTo: topView.bottomAnchor, constant: spaceBelowTopView() ?? 0)
|
|
topViewBottomConstraint?.isActive = true
|
|
self.headerView = headerView
|
|
showHeader(nil)
|
|
}
|
|
|
|
/// Gets the bottom view and adds it to a spacing view, footerView, and then calls showFooter.
|
|
open func createViewForTableFooter() {
|
|
let bottomView = viewForBottom()
|
|
self.bottomView = bottomView
|
|
|
|
let footerView = MVMCoreUICommonViewsUtility.commonView()
|
|
footerView.addSubview(bottomView)
|
|
bottomViewTopConstraint = bottomView.topAnchor.constraint(equalTo: footerView.topAnchor, constant: spaceAboveBottomView() ?? 0)
|
|
bottomViewTopConstraint?.isActive = true
|
|
bottomView.leftAnchor.constraint(equalTo: footerView.leftAnchor).isActive = true
|
|
footerView.rightAnchor.constraint(equalTo: bottomView.rightAnchor).isActive = true
|
|
footerView.bottomAnchor.constraint(equalTo: bottomView.bottomAnchor).isActive = true
|
|
self.footerView = footerView
|
|
showFooter(nil)
|
|
}
|
|
|
|
/// Takes the current headerView and adds it to the tableHeaderView
|
|
func showHeader(_ sizingWidth: CGFloat?) {
|
|
headerView?.removeFromSuperview()
|
|
tableView?.tableHeaderView = nil
|
|
guard let headerView = headerView else {
|
|
return
|
|
}
|
|
|
|
// This extra view is needed because of the wonkiness of apple's table header. Things breaks if using autolayout.
|
|
MVMCoreUIUtility.sizeView(toFit: headerView)
|
|
let tableHeaderView = UIView(frame: CGRect(x: 0, y: 0, width: MVMCoreUIUtility.getWidth(), height: headerView.frame.height))
|
|
tableHeaderView.addSubview(headerView)
|
|
NSLayoutConstraint.constraintPinSubview(toSuperview: headerView)
|
|
tableView?.tableHeaderView = tableHeaderView
|
|
}
|
|
|
|
/// Takes the current footerView and adds it to the tableFooterView
|
|
func showFooter(_ sizingWidth: CGFloat?) {
|
|
footerView?.removeFromSuperview()
|
|
safeAreaView?.removeFromSuperview()
|
|
guard let footerView = footerView, let tableView = tableView else {
|
|
return
|
|
}
|
|
|
|
if bottomViewOutsideOfScrollArea {
|
|
// put bottom view outside of scrolling area.
|
|
bottomConstraint?.isActive = false
|
|
view.addSubview(footerView)
|
|
footerView.topAnchor.constraint(equalTo: tableView.bottomAnchor).isActive = true
|
|
footerView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
|
|
view.rightAnchor.constraint(equalTo: footerView.rightAnchor).isActive = true
|
|
if #available(iOS 11.0, *) {
|
|
view.safeAreaLayoutGuide.bottomAnchor.constraint(equalTo: footerView.bottomAnchor).isActive = true
|
|
safeAreaView = MVMCoreUICommonViewsUtility.getAndSetupSafeAreaView(on: view)
|
|
safeAreaView?.backgroundColor = bottomView?.backgroundColor
|
|
} else {
|
|
view.bottomAnchor.constraint(equalTo: footerView.bottomAnchor).isActive = true
|
|
}
|
|
} else {
|
|
bottomConstraint?.isActive = true
|
|
var y: CGFloat?
|
|
if let tableFooterView = tableView.tableFooterView {
|
|
// if footer already exists, use the same y location to avoid strange moving animation
|
|
y = tableFooterView.frame.minY
|
|
}
|
|
|
|
// This extra view is needed because of the wonkiness of apple's table footer. Things breaks if using autolayout.
|
|
MVMCoreUIUtility.sizeView(toFit: footerView)
|
|
let tableFooterView = UIView(frame: CGRect(x: 0, y: y ?? 0, width: MVMCoreUIUtility.getWidth(), height: footerView.frame.height))
|
|
tableFooterView.addSubview(footerView)
|
|
NSLayoutConstraint.constraintPinSubview(toSuperview: footerView)
|
|
tableView.tableFooterView = tableFooterView
|
|
}
|
|
}
|
|
|
|
//MARK: - Functions to subclass
|
|
/// Subclass for a top view.
|
|
open func viewForTop() -> UIView {
|
|
let view = MVMCoreUICommonViewsUtility.commonView()
|
|
view.heightAnchor.constraint(equalToConstant: 0).isActive = true
|
|
return view
|
|
}
|
|
|
|
/// Subclass for a bottom view.
|
|
open func viewForBottom() -> UIView {
|
|
let view = MVMCoreUICommonViewsUtility.commonView()
|
|
view.heightAnchor.constraint(equalToConstant: 0).isActive = true
|
|
return view
|
|
}
|
|
|
|
//MARK: - Scrollview
|
|
open override func scrollViewDidScroll(_ scrollView: UIScrollView) {
|
|
// To stop handscroll animation if animating after scroll
|
|
stopHandScrollAnimation(true)
|
|
}
|
|
|
|
deinit {
|
|
tableView?.delegate = nil
|
|
}
|
|
|
|
//MARK: - Animation
|
|
open override func setupIntroAnimations() {
|
|
if let topView = topView, topView.subviews.count > 0 {
|
|
introAnimationManager?.addAnimation(animation: MVMAnimations.fadeUpAnimation(view: topView))
|
|
}
|
|
if let tableView = tableView {
|
|
introAnimationManager?.addAnimation(animation: MVMAnimations.animateTableViewFadeInCells(tableView: tableView))
|
|
}
|
|
if let bottomView = bottomView, bottomView.subviews.count > 0 {
|
|
introAnimationManager?.addAnimation(animation: MVMAnimations.fadeUpAnimation(view: bottomView))
|
|
}
|
|
}
|
|
}
|